general:glossary
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| MPEG-1 Layer 3 audio files. It is a compression technique for audio recording. The compression ratio usually is 12:1 (128..112 kbps for a stereo signal) and there is only very little loss of quality. Basically, this is realized by perceptual coding techniques addressing the perception of sound waves by the human ear. This technique was developed by Fraunhofer IIS (http://www.iis.fraunhofer.de/amm/techinf/layer3/). There are some patent issues on the software licensing, which concern Free Software. | MPEG-1 Layer 3 audio files. It is a compression technique for audio recording. The compression ratio usually is 12:1 (128..112 kbps for a stereo signal) and there is only very little loss of quality. Basically, this is realized by perceptual coding techniques addressing the perception of sound waves by the human ear. This technique was developed by Fraunhofer IIS (http://www.iis.fraunhofer.de/amm/techinf/layer3/). There are some patent issues on the software licensing, which concern Free Software. | ||
| - | ===== NTSC/M ===== | + | ===== NTSC ===== |
| Video format for the United States, Japan, Canada, and some other American continent countries. It consists of 29.97 interlaced frames of video per second. Each frame consists of 480 lines out of a total of 525 (the rest are used for sync, vertical retrace, and other data such as captioning). The NTSC refresh frequency was originally exactly 60(nbsp)Hz in the black and white system. In the color system the refresh frequency was shifted slightly downward to 59.94(nbsp)Hz to eliminate stationary dot patterns in the color carrier. Generally 60(nbsp)Hz can be used for anything. All NTSC television video should be capture or encoded at 704x480 at 29.97 or 30(nbsp)fps (frames-per-second). All NTSC DVD video should be encoded at 720x480 for full screen at 29.97 or 30(nbsp)fps (frames-per-second). NTSC widescreen sizes may vary. | Video format for the United States, Japan, Canada, and some other American continent countries. It consists of 29.97 interlaced frames of video per second. Each frame consists of 480 lines out of a total of 525 (the rest are used for sync, vertical retrace, and other data such as captioning). The NTSC refresh frequency was originally exactly 60(nbsp)Hz in the black and white system. In the color system the refresh frequency was shifted slightly downward to 59.94(nbsp)Hz to eliminate stationary dot patterns in the color carrier. Generally 60(nbsp)Hz can be used for anything. All NTSC television video should be capture or encoded at 704x480 at 29.97 or 30(nbsp)fps (frames-per-second). All NTSC DVD video should be encoded at 720x480 for full screen at 29.97 or 30(nbsp)fps (frames-per-second). NTSC widescreen sizes may vary. | ||
general/glossary.txt ยท Last modified: 2012/11/11 08:51 (external edit)
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