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Define the meaning for CBR and VBR more precisely. #78

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Define the meaning for CBR and VBR more precisely. #78

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16 changes: 9 additions & 7 deletions index.bs
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Expand Up @@ -288,13 +288,15 @@ spec: webidl; urlPrefix: https://heycam.github.io/webidl/#

<p>
The <dfn for='VideoConfiguration' dict-member>bitrate</dfn> member
represents the average bitrate of the video track given in units of bits
per second. In the case of a video stream encoded at a constant bit rate
(CBR) this value should be accurate over a short term window. For the
case of variable bit rate (VBR) encoding, this value should be usable to
allocate any necessary buffering and throughput capability to
provide for the un-interrupted decoding of the video stream over the
long-term based on the indicated {{VideoConfiguration/contentType}}.
represents the bitrate of the video track given in units of bits per second.
In the case of a video stream encoded at a constant bit rate (CBR)
this shall represent the average bitrate of the video track.
For the case of variable bit rate (VBR) encoding, this value shall
represent the maximum bitrate of the stream. In either case, this
value should be usable to allocate any necessary buffering and
throughput capability to provide for the un-interrupted decoding of
the video stream over the long-term based on the indicated
{{VideoConfiguration/contentType}}.
</p>

<p>
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