Thursday, 15 December 2011

Video and audio coding

HDV video and audio are encoded in agenda form, application lossy compression. Video is encoded with the H.262/MPEG-2 Part 2 compression scheme, application 8-bit blush and luma samples with 4:2:0 blush subsampling. Stereo audio is encoded with the MPEG-1 Layer 2 compression scheme. The aeroembolism audio and video are multiplexed into a MPEG-2 carriage stream, which is about recorded assimilate alluring tape, but can additionally be stored in a computer file.

The abstracts amount for both the audio and video is connected and is almost the aforementioned as DV abstracts rate. The almost low video abstracts amount can account bit amount starvation in scenes that accept lots of accomplished detail, accelerated movement or added circuitous action like aflame lights, and may aftereffect in arresting artifacts, such as blockiness and blurring. In adverse to the video, HDV audio bitrate is almost generous. At the coded bitrate of 384kbit/s, MPEG-1 Layer 2 audio is admired as perceptually lossless.

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