Some tips for CD
You can accommodate an S / CD did not burn:
– About. 735 bytes to a 74min/650MB CD MPEG data
– About. 795 MB CD-ROM, MPEG 1 80min/700MB data
You can accommodate a CD – ROM burning case:
– About. 650 MB data to a CD-ROM 74min/650MB
– About. 703 MB of data on CD-ROM 80min/700MB
————————————————– ————–
Introduction
Now let us ignore the terms of megabytes of CD capacity and try to understand how the data is stored on the CD.
As we all know, the data is stored as a binary digital data. This means that, but the actual information is actually stored on CD-ROM, these data in the "1" in the form of s and "0" was physical, and CD information is based on metal (aluminum) sheet of the pit.
1 1 CD – R discs, the data in the physical layer of organic dye to simulate a real pressed CD of the metal layer.
————————————————– ————–
Information is how the structure of
Now, the CD, the information is not only organized from start to finish will become a mess. Otherwise, it is really difficult to find useful information on the disc 1.
On the contrary, the information sector was held. Considered as a department is like a book page. As you can quickly find a book if you know the page number, you can quickly find something on a CD, if you know the number of divisions.
Now, please keep in mind that the CD is for the holding of the original audio data. The meeting decided that the CD accounted for 75 sectors of audio. While I can not speculate on the source of this figure is very appropriate to the audio CD. This means that you can "seek" an audio CD accurately to 1/75th second – which is more than enough for consumer purposes.
Now, with this in mind, we can work out a sector of user data, the total data capacity.
————————————————– ————–
In the sector of user data a total data capacity of a CD-ROM
CD audio using compressed PCM stereo, 16-bit resolution for the 44.1 kHz sampling.
Therefore, the 1 second of audio content:
16 bit / channel * 2 channels * 44100 times / sec * 1 sec
= 1.4112 million
= 176400 bytes
75 sectors per second, due to
A sector
= 176400 bytes / 75
= 2352 bytes
A sector in the CD contains 2352 bytes maximum.
————————————————– ————–
In different models and the concept of burning tables
Now, the audio CD is good, but the medium-term will become more useful, if you can store data on CD-ROM and others. This became to be aware of the CD – ROM courses.
Now, audio CD of the audio data using the industry as a whole.
However, for the problems caused by this CD. In short, CD-ROM and CD reading mechanism, there is no 100% perfect. In other words, the error (in fact, common errors), can be read. For the audio CD, this is not important, as much as you can simply interpolated from the adjacent audio samples. This is obviously not a data CD-ROM. 1-bit error may cause the program to be an implementation of unexecutable or damaged file.
Therefore, the CD-ROM, a part of each department is used for error correction code and error detection code. In the CD – R disc with the details of the problem, but in fact, only 2048 out of 2352 total bytes of each sector of data bytes of user data on the disc.
This combustion mode can be a mode 1 and mode 2 Form 1 in the.
————————————————– ————–
VCD and SVCDs Model 2 Form2 sectors
Now, VCDs and SVCDs, video tracks do not necessarily need to, as in CD – ROM of the normal data a strong correction. However, there are still some sectors of things, the use of video data than others (for example, synchronous head) overhead.
The S / VCDs video tracks are burning in so-called model 2 Form2 sectors. In this mode, only 2324 out of 2352 total bytes of bytes of each sector for the user data.
This is far more than CD-ROM, but still less than the audio CD of each department.
————————————————– ————–
The CD disc capacity CD-ROM, tapes and VCD discs
Now, obviously what ultimately determines the capacity of the disc is the industry's total number of people it contains. This is similar to a blank workbook in the total number of pages (if you remember this book example).
Secondary determining factor is the CD recording mode.
For the audio CD, this is because if you can fill the entire industry from top to bottom as the audio data, each page is used for audio data.
For the CD-ROM, this is because the rules if you need a deposit and then leave the bottom of each page of footnotes (ECC's head + + EDC) of the. You can actually write the text on each page so the amount of these other constraints.
For S / VCDs, we still need to rule out the gap on the page, but we do not worry about the footnotes (head). We are able to meet more than the text of the audio CD than a CD – ROM, but does not.
Now remember, 1 second, in the CD = 75 sectors.
Therefore:
– 74-minute CD = 333000 sector
– 80 min CD = 360,000 sectors
Data capacity to MB for audio CD
74 minutes
= 333,000 sectors * 2352 bytes / sector
= 783.216 million bytes
= 746.9 MB of the
80 minutes
= 360,000 sectors * 2352 bytes / sector
= 846.72 million bytes
= 807.5 MB of the
Data capacity to MB for a CD – ROM
74 minutes
= 333,000 sectors * 2048 bytes / sector
= 681.984 million bytes
= 650.4 MB of the
80 minutes
= 360,000 sectors * 2048 bytes / sector
= 737.28 million bytes
= 703.1 MB of the
Data capacity to MB for a S / CD
74 minutes
= 333,000 sectors * 2324 bytes / sector
= 773.892 million bytes
= 738.0 MB of the
80 minutes
= 360,000 sectors * 2324 bytes / sector
= 836.64 million bytes
= 797.9 MB of the
————————————————– ————–
Conclusion
As you can see, a number of 650MB oft-quoted reference to a 700MB capacity and CD – ROM capabilities.
Given the fact that S / VCDs use a different combustion mode, in which each department is for the user data, a relatively high capacity to provide.
Now, since S / VCDs video tracks are not from the pure, and there are some unavoidable costs, the actual total capacity of the video track on the left is a few MB every 74min CD-ROMs and 80 minutes CD-ROM CD-ROM 795 MB (about 735 MB of less ). This is a 740MB capacity and frequently cited source of 800MB. They are quite accurate.
All of these capabilities can be burned before. Burning is your CD-ROM burning more than the rated department. If you overburn, you can usually achieve about 1-2 minutes of additional capacity (in your drive and media may be).
If you need to convert FLAC to MP3, please visit TopMediaTool.com, your unbiased and trustworthy source on audio, video, DVD, Blu-ray, iPod and iPhone tools.