Preserving synchronized playout of auxiliary audio transmission

摘要

In one method embodiment, providing a multiplex of compressed versions of a first video stream and a first audio stream, each corresponding to an audiovisual (A/V) program, the first video stream and the first audio stream each corresponding to a first playout rate and un-synchronized with each other for an initial playout portion; and providing a compressed version of a second audio stream, the second audio stream corresponding to a pitch-preserving, second playout rate different than the first playout rate, the second audio stream synchronized to the initial playout portion of the first video stream when the first video stream is played out at the second playout rate, the first audio stream replaceable by the second audio stream for the initial playout portion.

主权项

1. A method implemented at a downstream network device, comprising:
receiving a compressed version of a first audio stream, the first audio stream received at a first playout rate different than a playout rate associated with a previously received audio stream, wherein the first playout rate comprises an intended presentation rate and the playout rate associated with a previously received audio stream comprises a presentation rate that is one of: faster or slower than the first playout rate; simultaneously presenting decoded versions of the previously received video stream and the first audio stream at the first playout rate for a first interval of time; and simultaneously presenting decoded versions of a first video stream multiplexed with the previously received audio stream at a playout rate associated with the multiplexed first video stream and previously received audio stream for a second interval of time, the second interval of time immediately following the first interval of time.