Buffer expansion and contraction over successive intervals for network devices
AssigneeCisco Technology, Inc.
InventorsAli C. Begen, Tankut Akgul, Michael A. Ramalho, David R. Oran, William C. Ver Steeg
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Abstract
In one method embodiment, receiving from the network device a multiplex of a compressed video stream and a compressed audio stream, the multiplex comprising a succession of intervals corresponding to a video program corresponding to a first playout rate; and at the start of each interval, replacing the compressed audio stream with a compressed, pitch-preserving audio stream corresponding to a second playout rate different than the first.
Claims20
A method implemented by a downstream network device, comprising:
- receiving from the network device a multiplex of a compressed video stream and a compressed audio stream, the multiplex comprising a succession of intervals corresponding to a video program corresponding to a first playout rate;
- and
- at the start of each interval, replacing the compressed audio stream with a compressed, pitch-preserving audio stream corresponding to a second playout rate different than the first.
A method implemented by an upstream network device, comprising:
- providing by the network device a multiplex of a compressed video stream and a compressed audio stream, the multiplex comprising a succession of intervals corresponding to a video program corresponding to a first playout rate;
- and
- providing a compressed, pitch-preserving audio stream for each interval of the succession of intervals, each of the pitch-preserving audio streams corresponding to a second playout rate different than the first, the pitch-preserving audio stream synchronous to the video stream when the video stream is played out at the second playout rate.
A downstream network device, comprising:
- a memory encoded with logic;
- and
- a processor configured with the logic to:
- receive a multiplex of a compressed video stream and a compressed audio stream, the multiplex comprising a succession of intervals corresponding to a video program corresponding to a first playout rate;
- and
- at the start of each interval, replace the compressed audio stream with a compressed, pitch-preserving audio stream corresponding to a second playout rate different than the first.
Dependencies are inferred from the claim text.