AVC/H.264 Profile

AVC/H.264有四种不同的Profile:

- Baseline Profile 提供I/P帧,仅支持progressive(逐行扫描)和CAVLC
- Extended Profile 提供I/P/B/SP/SI帧,仅支持progressive(逐行扫描)和CAVLC
- Main Profile 提供I/P/B帧,支持progressive(逐行扫描)和interlaced(隔行扫描),提供CAVLC或CABAC
- High Profile(也就是FRExt)在Main Profile基础上新增:8x8 intra prediction(8x8 帧内预测), customquant(自定义量化), lossless video coding(无损视频编码), 更多的yuv格式(4:4:4...)

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The AVC/H.264 standard defines four different Profiles:

- Baseline Profile offers I/P-Frames, supports progressive and CAVLC only
- Extended Profile offers I/P/B/SP/SI-Frames, supports progressive and CAVLC only
- Main Profile offers I/P/B-Frames, supports progressive and interlaced, and offers CAVLC or CABAC
- High Profile (aka FRExt) adds to Main Profile: 8x8 intra prediction, custom quants, lossless video coding, more yuv formats (4:4:4...)


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