The AZID application was designed to be a small AC3 decoder tool.
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AC3 encoded audio is divided into frames. One frame gives 1536 samples
of audio or 32ms of audio at 48kHz sampling rate. A single frame is divided into several sub-sections:
■ syncronization
■ bit stream information (BSI)
■ 6 audio blocks
■ auxilliary data (and CRC)
The BSI section contains information regarding the bitstream and the current frame. It contains information like samplerate, number of encoded channels, downmix-levels, dynamic compression types, program contents, etc.
The audio block contains the actual encoded audio. One block gives 256 samples (approx. 5.3ms at 48kHz). One audio block is atomic; the audio decoding operation is repeated for each of these six blocks. The specific details of this operation can be found in the A/52 spec.
| File Size: 247 KB | Downloads: 11891 |
| Added: Jul 11th 2008 |
User rating: 4.4
1327
4.4
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Company: Midas
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Supported Operating System: Win All |
User reviews
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