VCD video disc

VCD, Video disc （Video Compact Disc;VCD）, It is a kind of CD （Compact Disk） Standard for storing video information on .VCD Can be in Personal computer or VCD player as well as Most of the DVD player In the play .VCD Standard by SONY 、 philips 、JVC、 panasonic And other electrical appliance manufacturers united in 1993 Made in , Belonging to a digital disc white paper standard .

Related information

VCD Compact disc 　VCD namely Video Compact Disc Abbreviation ： Video compression disc .

The technical specification

VCD It is a fully dynamic 、 Full screen video standard . Its format can be divided into ：

A resolution of 352x240 Pixels , Per second 29.97 picture （ fit NTSC Standard system On TV ）;

A resolution of 352x240 Pixels , Per second 23.976 picture .

Compact disc

A resolution of 352x288 Pixels , Per second 25 picture （ fit PAL Standard system On TV ） Overall, the resolution is about the same The TV system A quarter of the resolution .VCD The video of is MPEG-1 Compression coding , Audio adoption MPEG 1/2 Layer 2(MP2) code . The code rates are video 1150kbit/s, Audio 224kbit/s. Whole Video quality and VHS The videotape is quite .

because VCD Bit rate and common music CD Quite a , therefore , A standard 74 Minutes of CD It can store about 74 Minutes of VCD Format In the video .

VCD standard

VCD There are three formal criteria ：1.0、1.1 and 2.0：

1.0： The original version .

1.1： Revised version .

2.0： Added Play menu function (PBC)、 Clear still picture Play function (704x480 or 704x576 Pixels ) And support 352x288/25fps Format .

3.0： Many people say that there are 3.0 edition , But no finished product has been published .

VCD Compact disc

VCD application 　VCD It is widely used in Asia . In Hong Kong ,VCD and DVD It has completely replaced videotape and... In the distribution market Laser disc The status of .VCD Considered to be DVD replaced , But because of some of its characteristics , Will also maintain the market for a period of time .

VCD Didn't like DVD Same area code restrictions , This means that it can be viewed on any compatible machine .

Some programs have cost problems , Can't make DVD or VHS Video version , Buyers can only buy VCD edition .

VCD Than DVD cheap , Low production cost . Of course ,VCD lack DVD Many additional features provided , Such as multilingualism 、 Multiple subtitles 、 Multiple perspectives , menu 、 Hyperlinks and large capacity .

SVCD

SVCD yes VCD Standard for improvement , It uses MPEG-2 Compress , Use variable compression ratio To get better video quality .

It and ordinary CD The same size , There is no difference in structure , It's just that the video programs are stored on it , So it's commonly known as “ Video disc ”, And because it's better than Laser disc player The use of LD DVD small , So it's also called “ Small video disc ”. Its audio and video playback quality is better than that of video tape , But it's a little worse than a big movie . VCD The CD-ROM can be stored in VCD machine Play it directly on the screen , It can also be played in a computer equipped with an optical drive .

File format

VCD Format Usually MPG or DAT

MPG It is the format used when saving after editing by the computer

DAT Is the format after being burned to a CD

VCD What is it? ？　　 Maybe many people don't understand VCD What is it? .VCD It's actually Video Compact Disk Abbreviation , Is a compressed image format . It's using MPEG-1 To compress the image , The resolution has reached 352 * 240（NTSC） or 352 * 288（PAL）1.15Mb/s Video Bit Rate, The sound format is 44.1KHz Sampling frequency ,16 Bit Sampling value ,Stereo stereo ,（ Before compression , This audio format is CD Tone quality , That is, the music we often listen to CD The sound quality of .）MPEG-1 layer 2,224Kb/s Audio Bite Rate Compression mode of . With this compression , It's reverting to music CD After the format , Even trained professional auditionists cannot tell the difference from the original CD The difference in sound quality . in other words , This compression method is a non-destructive compression .

difference

VCD Player

In addition to distinguishing from the logo , It can also be distinguished from the disc color . commonly CD The color of the disc is aluminum white , Or light blue with a little disk based material 、 Light green, etc . and DVD The plate is a very obvious dark purple . in addition , There is also a difference from the capacity , General purpose CD The capacity of the disk is 700M,DVD The capacity of the disk is 4.7G. Whether the two discs have been recorded （ There may be data ）, Visible Disc burning Whether there is color difference on the surface . If it is a recorded disc , There will be two colors , Where there's data （ Inner circle ） Deeper .CD The disc is not obvious , Look over and over at the light , Especially when the disc is full .DVD It is easy to see whether the CD has data .

Be clear DVD Disc and VCD The difference between discs . Their disc structures are very different , Resulting in a big difference in capacity （CD：600～700MB;DVD:4.3GB about ）, The amount of data stored is also different .VCD yes Video CD Disc , Belong to CD. So if it is Video disc ,DVD And CD The length of time or picture quality is different .DVD be better than CD Disc .

DVD Is a CD format , and VCD yes Video CD, Means storing video content , But it still applies CD Scope of the white paper . Industry standards include DVD and CD Two storage media . Actually, the data density of the disc is specified , Laser wavelength , Track spacing , speed , Physical standards such as material thickness of disc body .

and VCD Just to illustrate this CD There are videos on the disk , Is similar to MP3 CD equally .

Make it clear again ,DVD Player and VCD The concept of the player . seeing the name of a thing one thinks of its function ,DVD The player is playing DVD Disk device ;VCD It's playing VCD Disk device . The main difference in the hardware of their equipment should be that the laser wavelength emitted by the laser light-emitting tube is different .

VCD Is the audio format of MP3？

　　MP3 The correct name is MPEG-1 layer 3. And in the VCD The audio part of the format , Although it is a compressed audio format , But it's not what we know MP3 Music format , instead MPEG-1 layer 2 The format of . therefore , You can't use it to transcribe into music CD Format .﹙ Because most recording software only supports WAV File and MP3 Shift to burning CD The function of .﹚ If you really need to be VCD The sound part in the middle is made into music CD Words , Just use the sound card with the recording program , Record it as WAV file , Then use the recording software to record WAV The document is converted into CD Format is OK , There is no need to use Image capture card Of .﹙Windows The built-in recording programs include 60 The second limit , Can't use , So you need to use the utilities that come with your sound card to record .﹚MPEG-1 layer 1 And layer 2 It's designed to handle VCD The compression processing method for the audio format of , and layer 3 Is what we know MP3 Music format .MP3 The compression method of is 192Kb/s Of Audio Bit Rate, The rest are related to layer 2 identical , But it's reverting to music CD After the format , If you listen carefully, it's more , You can tell that it is different from the original CD There has been slight distortion in the sound quality of the film . in other words MP3 It is actually a destructive compression method , So if you have high requirements for sound quality ,MP3 It's not your good choice . But relatively speaking ,MP3 The file size of is only normal CD Acoustic WAV Of documents 1/10 size ！

Please note that image file Size

　　 On a blank CD , The capacity is about 650MB-680MB about , Recording music CD Format can be put into 74 The length of a minute , And record VCD The image can be put down 50-60 minute , So if your image is longer than 1 Hours , Please segment to intercept , To avoid exceeding its maximum capacity when burning to a blank disc . most important of all , When capturing images , You must pay attention to whether the image capture format parameters you set are completely consistent with VCD Standards for . As long as any one of them does not conform to , The recorded disc cannot be played , Then even if it is a failure .

Of course , Recent blank discs are advertised as “ Super long ”, with 700MB The capacity of , Into music CD The format of the word is about 79 More minutes , and VCD The image can be squeezed down nearly 70 The length of a minute . But in order to keep the image longer , I still suggest that all users Try not to burn so full , Leave some space in the outer circle , because CD-R The outer ring of a blank disc usually has a dye layer ﹙ Is the part that can be burned ﹚ The coating is not uniform , And it's easy to touch the outer ring when you take it out , Scratch or blurry surface , As time goes on, it is easy to produce unreadable situations .

Why did you burn it VCD Can't play ？　 I believe this is a headache that many people will encounter ： Why can the images I created be played on the computer , You can't use it after burning a CD VCD Machine to play ？ In fact, most of the problem lies in the above “ accord with VCD Parameters of ” The options are . because VCD There are strict format regulations , And if the image format you make doesn't match VCD Standards for , It will lead to VCD The CD you are burning cannot be recognized by the CD player , Of course, there is no way to play . From this you can know , Not all MPEG-1 Documents can be burned VCD Of ！ It could also be yours VCD machine “ Pick the plate ” 了 ！

So complicated ？！ How can I remember so many parameters ？！

You may feel that you should pay attention to a lot of standard parameters to make you dizzy , But the author is also very helpless to remind you that you must pay attention to . Don't be shy yet , You can rest assured , Most of them MPEG-1 Image capture cards have a thoughtful design ： You just need to start intercepting before , To “ Options ” In the “VCD” Tick the box in front of the empty Pavilion , The system will automatically lock the relevant parameter options , You are prohibited from changing . With the help of VCD Standard image , You can use it to burn VCD Image disc . Isn't that convenient ？

How to check whether the disc I have burned is correct ？

Here's a simple inspection tip for you , You can make sure that the VCD CD-ROM can be used in VCD Play on board . All you have to do is before you burn , Press the right mouse button to call out the function menu , Choose to watch “ File attribute ”﹙Property﹚, Confirm that each data track is in “ Create a standard editing CD ”﹙Standard Compliant﹚ This item is “YES” That's it .

If you have confirmed “ Create a standard editing CD ”﹙Standard Compliant﹚ After it has been met , Yours VCD The computer still can't read the CD , But on a computer or something VCD The computer can play normally , Then it's yours VCD machine “ Pick the plate ” 了 . You can change to another brand CD-R Try a blank disc , Or put your VCD Try again after cleaning the disc .

What recording software should I choose ？

You can use any burning program to burn , As long as it has support VCD The standard template can be used . Some well-known recording software are CD Maker、Nero、Win On CD、EZ CD Creator、Easy CD Pro… etc. . When selecting the recording software , You must also consider whether the recording software can “ know ” Yours CD writer ,﹙ On this point , You can find the answer on the original website of each recording software .﹚ And most importantly ： Can standards be supported VCD Format recording . For example, burn the player's favorite Clone CD You can only do CD Torture , It doesn't support VCD I burned it ！ So even if you have this recording software , You can't burn VCD Of .

MPEG-1 = VCD？MPEG-2 = DVD？

Many people intuitively put VCD And MPEG-1 Draw an equal sign , take DVD And MPEG-2 Also draw an equal sign , And think MPEG-2 Your picture quality must be better than MPEG-1 Better , This is not the right idea . To be right VCD Just use MPEG-1 An image file produced by the compression method of . Not all MPEG-1 Documents can be made into VCD. alike ,DVD Just use MPEG-2 An image file produced by the compression method of , Can't say DVD Is equal to MPEG-2.

MPEG-1 It doesn't necessarily have to be done VCD, It can also be played on the computer ,MPEG-2 It doesn't have to be done DVD, It can also be played on a computer , It's just that , Because it's not VCD or DVD Standard format , Yours VCD or DVD Your player doesn't know it , So it won't play . in fact ,VCD The reason why the picture quality is not good , Because when the standards were formulated , its Video Bit Rate（ Video streaming ）, Limited to... Per second 1.15Mb, A little higher or lower than this value is not acceptable , Not because it uses MPEG-1 The compression method of .

VCD Can the image quality be improved ？

Many people always think that it can be made into DVD Picture quality is good , In fact, in addition to being used for commercial purposes , If you spend so much money just for your personal interests , That's not the best choice . By contrast , In spite of the present DVD CD writer And DVD The price of the disc is already accessible , But in terms of current penetration ,DVD It's not as good as VCD. however , With VCD By the standards of , Because it is limited to every second 1.15Mb/s Of Video Bit Rate（ Video streaming ）, So just try your best , The picture quality can not be greatly improved . But if you don't have to make it VCD, that MPEG-1 The document can also achieve excellent picture quality , It doesn't have to be MPEG-2 To get good image quality .

What are the advantages and disadvantages of doing this ？ The advantage is that the image quality is greatly improved , also CD The disc can be kept for a long time , Not all the files are crammed into the hard disk to take up space . The disadvantage is that it cannot be used DVD The player plays , And one CD-R The length of images that can be held on a blank disc will also be greatly reduced ,﹙ Because the bit rate increases , The file will get bigger ！﹚ So this method is very suitable for requiring high image quality , But users who don't have long images , For example, the advertising industry .

If you don't need to be in VCD Play on the player of , But just to play it on the computer , Then why do you have to cling to VCD The format of ？ Improving the video stream can greatly improve your image quality , And now the price of hard disk is cheaper , The same video , The cost of preservation is much lower than that of the disc , Why not do it ？

DVD Player

VCD DVD Player

20 century 90 s , International Organization for Standardization Development and publication of standard algorithms , Formed a Data compression technology The starting point for the rapid transformation of new products to various industries , This has led to a revolution in film and television technology , It has brought modern household appliances into a Xintiandi of digital technology . The world's first VCD Videodisc machine Hefei Meiling Wanyan Electronics Co., Ltd 1993 The annual rate was first introduced .VCD Video disc player is a kind of light collecting device 、 electric 、 Mechanical technology in one Digital audio and video product , yes MPEG Digital compression technology and CD The product of the combination of Technology , The price is low 、 High cost performance 、 Software programs are abundant , Get people's recognition . Although in Image clarity And timbre are inferior to LD and DVD, But it did not affect their access to ordinary families , Instead, it has become a hot spot in the consumption of household appliances .VCD The video disc player is the successor LD DVD Player and CD A new type of CD player developed after the CD player , It is a kind of digital audio 、 video signal Playback device . VCD The movement of a video disc player 、 Laser head And its servo circuit 、 Digital signal processing circuit and CD The record player is the same , It's just CD A set of is added to the machine MPEG Decoding circuit and video D/A Transform and coding circuit . therefore ,VCD Video disc player can play CD CD and VCD Compact disc . about VCD The quality of the image played by the video disc player , Its Horizontal clarity by 250 Line , amount to Home video recorder （VHS） Playback image quality level . actually , because VCD The video disc machine uses a laser beam to read information , The disc and laser head are free of wear , The image quality will not deteriorate due to long use time , therefore VCD The image quality of video disc is better than that of home video recorder .

The world's first VCD DVD Player

Many people put “ Wanyan ” card VCD My first success was attributed to “ inspiration + Opportunity ”.1992 year 4 month , Jiang wanmeng, who also works in Anhui TV station, went to the United States to participate in the international radio and television technology exhibition . At this exhibition , Jiangwanmeng was killed in the United States C-CUBE An obscure technology exhibited by the company ——MPEG Decompression technology firmly holds the eye .

Jiangwanmeng is acutely aware of ： It can store images and sounds on a small CD MPEG technology , It means that we can create a kind of audio-visual products with good quality and low price , For common people to use at home . and C-CUBE Sunyansheng, the chairman of the company, happens to be an American Chinese businessman , The two hit it off , Determined to MPEG Technology development for electronic consumer products .

Jiangwanmeng immediately invested 7 Ten thousand dollars to develop .1993 year 9 month , The two cooperated to develop the world's first... In Hefei VCD DVD Player , The name “ Wanyan ”. When each set 4000-5000 yuan “ expensive ” When put on the market , The first 1000 platform VCD As soon as the machine was put into operation, it was bought by various electronic manufacturers as a prototype , Sales are booming .

When Wan Yan is trying to show off her ambition , Aido 、 New section 、 Xiamen new 、 Wanlida 、 Jin Zheng 、 Xianke flocked to the market . They made it with a prototype of Wanyan VCD product , Immediately captured most of the market .1995-1997 year , For the media “ blowout ” To describe VCD The grand occasion of the market .

Because I didn't apply for a complete machine patent for my first invention , Facing the low price competition of many brands , Wanyan is losing her edge , But the brilliance created by this brand , It has become the history of the home appliance industry .

Now VCD、DVD It is no longer rare , And by the VCD Developed home theater , It has gradually become one of the essential household appliances for thousands of families . A small invention of Hefei people , In the history of Chinese household electrical appliances “ Made in Hefei ” A heavy painting , It also brings unprecedented audio-visual enjoyment to people who love film music all over the world .

But what surprised jiangwanmeng was , Only a few years VCD It has risen rapidly in China , And it's all over the world , become For an annual sales revenue of 100 A large industry worth more than 100 million yuan . Even Japan, which has a developed electronic industry 、 The United States should participate in Wanyan made according to him VCD To produce .

from 1996 Year begins , China's VCD The market grows several times every year , Sales volume from 1995 Year of 60 ten thousand Tai Meng increases to 1996 year 600 Million units ,1997 Annual sales reach 1000 Ten thousand units . Only a short time 5 year ,VCD Video disc The accumulated sales of the machine have 5000 Ten thousand units , And gave birth to aido 、 backgammon 、 New section And other domestic famous brands . but “ Wanyan ” But in this industry , from “ Pioneer ” Become “ Martyr ”, Its market share goes from 100% Fall to 2%.

Why is Wanyan hindered by technological innovation

Talk about the reasons for the failure , Fengyidan, chairman of Wanyan company, said sadly , On the technical ,“ Wanyan ” The invention 了 VCD machine , But I didn't apply for a patent , After listing, it was imitated by companies at home and abroad , These manufacturers invest less Go in VCD　 industry , Sufficient funds for market development . and “ Wanyan ” In the face of a group of competitors , Without a shield to protect themselves . On capital ,“ Wanyan ” The investment in early research and development is 1600 Wanmei element , at that time , The Chinese people are right VCD The understanding of is almost zero , To develop the market ,“ Wanyan ” Put in again 20 00 Ten thousand yuan , Due to too much investment in the early stage ,“ Wanyan ” Already embarrassed and burdened . The shortage of funds makes “ Wanyan ” An inch Difficult to do ; In market development ,“ Wanyan ” The early stage , Lack of experience in marketing , Not paying attention to the product Market operation . The funds are mainly deposited in the stage of technology development and market development , And “ Aido ” And other brands spend a lot of money on Advertising creates momentum ,“ Wanyan ” The marketing of the company seems to be inadequate , It didn't make a big splash , Market share is Nibble away , Finally, I ended up making wedding clothes for others .

“ Wanyan ” After disappearing from the market , Whole VCD The industry is changing , Major manufacturers continue to introduce accessories Adding new technology VCD product , To 1999 year , In the fierce competition , Many well-known enterprises are in trouble ,“ Bully king ” Bankruptcy ,“ Aido ” Serious losses , The whole industry is facing transformation .DVD Products are beginning to replace VCD.

stage a comeback 　 play DVD This trump card

After many setbacks ,“ Wanyan ” One has to endure hardships , Look for opportunities , Determined to make a comeback .1998 year , Guangdong Yian group and Anhui Wanyan Electronics Co., Ltd. have reached a transfer agreement ,“ Wanyan ” Fly from north to south , Settle Jiangmen , Become Guangdong Wanyan group . Hong Kong Jingfa group has also reached a comprehensive cooperation agreement with Guangdong Wanyan , Set up Jiangmen Ruineng Wanyan electronic products Co., Ltd , Wanyan has entered the era of sharp Wanyan . According to introducing , The sharp power of ten thousand swallows has become For a collection of digital technology product development 、 production 、 A large enterprise integrating sales , The annual production capacity reaches 300 Ten thousand units , Wanyan DVD player sales ranked No. in China 12 position . Strive to enter China within three years DVD Top three , The ultimate goal is to become the leader of China's digital industry “ The aircraft carrier ”.

face DVD replace VCD Market opportunities ,“ Wanyan ” whole , Make use of the advantages of technical research and development over the years , Huge financial support , Create brilliance again . Chairman fengyidan said , Produced by Wanyan DVD Never again VCD Mistakes , We have summed up the past experience and lessons , Start with the management of enterprises , go “ Product development ” and “ Marketing Management ” The development model of paying equal attention to both sides , According to the market demand, we continuously launch digital products with advanced performance , Seize the market with different products . When asked about the current foreign 6C The manufacturer is interested in China DVD When the products are combined to attack , Chairman Feng did not show much concern , He said , Wanyan products have unique advantages in technology and quality , The new generation of DVD players will be sold in nine months 30 Ten thousand units , The repair rate is less than 1%, It's competitive . The layout of our export products is also adjusted in India 、 Russia and other countries , It won't be much affected .

comment ： The enterprise should not become a technological innovator “ victim ”

Why did Wanyan not benefit from technological innovation , But it has become a technological innovation “ victim ” Well ？

Analyze what strategies should be adopted by the pioneers in the technology and market , To effectively protect themselves and benefit from new technologies and products , At the same time, do not give followers the opportunity to imitate themselves , So that technological innovation can be maintained for a longer time , This is obviously a crucial issue .

A well-known domestic economist believes that , Whether the dominant position of the pioneers is sustainable depends on the following four factors ：

The source of technological innovation ： The persistence of technology leadership largely depends on the fact that this new technology is developed within the enterprise , Or from outside the enterprise . If it's the former , The dominant position of the pioneers can be maintained for a long time ; If it's the latter , It will be difficult to maintain technological leadership .

The ratio of technology development expenses to enterprise sales ： Enterprises with large market share are compared with enterprises with small market share , The research and development cost of the former is relatively low .

Relevant process skills ： If the pioneer has unique technological skills 、 Scientific management 、 Innovative researchers , It is possible to maintain the leading position in technology for a long time .

The speed at which technology spreads ： If the technology developed by the pioneers is easily available to the followers , It's like VCD Technology was quickly imitated like that , The technological innovation efforts of the pioneers will “ The bamboo basket is empty ”. The means to prevent the rapid spread of technological innovation include ： Strict confidentiality system 、 Patent application 、 Prevent outsiders from visiting the enterprise at will 、 Self developed production equipment 、 Retain key technical personnel .

China VCD development history

1993 year 9 month , Jiang wanmeng, a scholar studying in the United States 、 Sunyansheng produced the world's first VCD.

1996 - 1997 year , Aido 、 New brands such as Xinke began to enter the market on a large scale , And occupy VCD Most markets .

1998 year 9 month , A nationwide SVCD And CVD The standard debate .1998 year 8 month , The Ministry of information industry formulates 《 Super VCD System industry specifications 》, On 1998 year 11 month 1 Take effect .

1998 year 10 Month to 1999 year 7 month , Major DVD player manufacturers continue to introduce additional new technologies VCD product , If available MP3 and MIDI Super VCD, Palmtop super VCD And recordable super VCD. It's even done VCD Networking and voice repeat , In order to realize the VCD Teaching aids .

1999 year 1 month , The advertising expenses of the DVD player industry fell sharply . In the fierce competition , Many well-known enterprises are in trouble , Such as “ Little overlord ” Bankruptcy and “ Aido ” Severe loss .

1999 year 7 month , All major manufacturers started to cut prices on a large scale , The prices of ordinary single disc players have fallen below 800 element / platform .DVD Products are beginning to replace VCD.

Maintenance

Quakeproof

Although some brands VCD The machine has good shockproof performance , But most VCD The machine should not be used in places with vibration , Otherwise, the laser scanning accuracy will be affected , The quality of music and painting has been seriously affected . therefore , Use VCD The machine should not be moved frequently , No collision or impact . Even when handling, it should be handled with care , So as not to affect the internal components .

dustproof

VCD High precision of machine components , If dust enters the machine , It will make its components work abnormally , It may even cause serious faults such as damage . therefore ,VCD The machine shall be placed in a clean environment and corresponding dust prevention measures shall be taken . Dust removal shall be carried out by means of electric hair dryer cold blowing or vacuum cleaner suction under the shutdown state , Don't dismantle the machine frequently to remove dust .

Cold proof

In the cold winter 、 In the spring , Such as the VCD The machine is placed at the door 、 Windward places such as windows are bound to make VCD The machine is stimulated by cold . This will make VCD Mechanistic factors “ Catch a cold ” But it can not be used normally and accelerate the aging of components and lose its life .

Heat proof

VCD Machines are afraid of both cold and heat . It is best to place it in a cool and ventilated place , It should not be exposed to direct sunlight or close to the stove 、 Heat sources such as heaters . Don't put the VCD Put the machine on Power amplifier 、 Above the pressurizer , Also avoid placing on carpets 、 Sofa, mattress, etc , So as not to hinder the heat dissipation of the machine .

Moisture-proof

VCD Damp tends to make Optical lens Fuzzy , As a result, the laser beam cannot pick up signals normally . When the weather is humid or the weather changes suddenly , It will cause dew drops or mist in the machine , If used, let VCD The machine is powered on and preheated for a few minutes , Then place Disc Play . Keep dry around the machine at ordinary times , In case of wet weather such as plum rain season, you should always turn on the machine to drive away the moisture . If VCD The machine is often wet , in the course of time , It will make the parts rusty and even the whole machine invalid .

Fault handling

Fault type	The cause of the problem	Solutions
It doesn't play properly	The disc is dirty	You can use VCD Clean the disc with detergent or clean it with a soft cotton cloth dipped in pure distilled water
	The disc position is incorrect	Straighten the disc
	Low ambient temperature	You can test the machine while heating , Stop heating immediately when normal
	There is a foreign object on the laser head	use VCD Cleaning with special detergent for machine
		Ask professional personnel to maintain
Out of control	The remote control invalid	Check the remote control buttons 、 Replace the remote control battery
	The temperature inside the machine is too high	Shutdown for cooling
downtime	Press the shutdown button by mistake	Reboot
	Working in the play timing state	Cancel playback timing

Choose

Pay attention to the size of the disc （LD and VCD） compatible , And pay attention to single disc drive or multi disc drive （ Usually three dishes ） machine . A single disc drive is more economical , But multi disc drive is more convenient . The price of compatible computers is a little expensive .

（1） Pay attention to whether there is double Microphone Cara OK Function and digital reverberation digital echo , Change tune （ Language 、 Tone change ）, Eliminator （ Multistage silencing ） function , Have the ability to see 、 listen 、 Sing the Trinity 、 Convenient and practical, with good functions .

（2） Check whether it has the function of retrieving program list . This function is the main symbol to distinguish the refitted machine from the all-in-one machine . It has this function Of VCD machine , All adopt the latest VCD 2.0 standard , The program list can be displayed directly on the fluorescent screen , And compatible CDG、CD-DA、CD-1, It is the most versatile model at present .

（3） Check if there is PBC function .PBC yes PLAY BACK CONTROL Abbreviation . The machine with this function is playing 2.0 edition VCD Video disc time , It can realize man-machine conversation without computer , And can insert high-resolution still images and in the ordinary CD Enjoy in the machine VCD music .PBC The function is VCD An important symbol of the machine performance level .

（4） Check whether the system selection function is available . If this function is available , Whether manual or automatic , Can in PAL Standard system TV shows NTSC Standard system The film of ; otherwise , Due to different systems , The image becomes narrower during playback . therefore , This is also the most basic condition for purchasing .

（5） Check if there is a belt S Terminal output . A big screen Color TV sets need to have tape S Terminal VCD machine , Its high definition will be shown .

（6） Be careful Performance price ratio . Abroad Famous brand products The performance is generally reliable , But the price is much more expensive than the domestic products of the same grade ; The quality of some domestic products 、 function 、 Images 、 Good sound quality , Especially the ability to correct errors , The playback VCD-10 The ability of old films is strong , For example, Anhui Wanyan CDK·320, Shenzhen Xianke VCD-10 wait , The price is much cheaper than foreign products of the same grade , When purchasing, you should consider .

（7） Pay special attention to the model . Whether imported or domestic VCD machine , Should be selected VCD 2.0 Model produced by version specification , Because press 2.0 Brand specifications VCD DVD Player , The performance ratio is based on 1.0 Version and 1.1 The DVD player produced according to the brand specification is much superior .

（8） Pay attention to the origin and manufacturer of the product . If it is an imported machine , There should be a description or certificate of commodity inspection ; If it is a domestic machine , Must have the product certificate , Confirm that it is a regular product . Viewed from the outside , Formal product design is elegant , The workmanship is excellent , The manual is exquisitely printed 、 Clear ; Factory name 、 site of a factory 、 The service outlets were explained clearly .

（9） Read the instructions carefully . Understand the technical specifications and various functions of the DVD player . In addition to checking the above functions with the manual for actual operation , Attention should also be paid to trying out multi track selections 、 Replay and memory 、 Program pre calibration 、 Wireless remote control . Show listings and high clarity The freeze frame is MPEG-1 standard 2.0 The edition machine should have the performance that must be checked . If all the above requirements can be met , It shows that its performance is excellent . however , yes , we have VCD The DVD player has as many functions as 15 More than species , And a single disc 、 Three dishes 、 Five or even seven dishes , You can choose according to your actual situation and requirements .

There is a press MPEG-2 standard Trial production DVD Series of products , Also use 12cm Diameter disc , One side can record 130 More than minutes of film and television programs , Sharpness is better than VCD、LD high , However, the technical feasibility and price have not met the appropriate requirements at present , It should be noted that .

Finally, anti inferior discs . They will overload the laser devices , It will not only shorten the service life of the laser device, but also easily damage the laser device , The result is that the gain is not worth the loss .

Virtual CD-ROM

Virtual CD-ROM (Drive) It is a set of tool software that simulates the real optical drive , It can create up to 23 Virtual CD-ROM drive or 1000 Optical drive cabinets , Compress the application software and data on the CD into one Virtual optical drive file （*.VCD） Stored on the designated hard disk , A virtual CD-ROM icon is generated to inform the operating system , This virtual CD-ROM can be used as a CD in the CD-ROM drive . So when you want to start this application in the future , It is no longer necessary to put the disc in the physical drive ( It can be executed without a physical optical drive ), There is no need to wait for the CD-ROM drive to start slowly , Just in Virtual disc Double click on the icon , The virtual disc will be loaded into the virtual disc drive immediately , Fast and convenient . This edition is multilingual , Include ： Chinese version 、 English version 、 And Japanese version , During installation, the language version of the operating system will be automatically detected and automatically installed .

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