search for: opust

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2016 Apr 18
5
Channel Mapping Family for Ambisonics
Hello, We (Google) have been experimenting with configuration and adjustments to CELT-only Opus that give good results for compressing ambisonic audio signals [1]. Based on our results so far, we would like to use Opus to encode spatial audio. We hope to make it easy/possible to use libopus with other common tools and software modules (ffmpeg/libav in particular). Based on my reading of the
2016 Apr 19
3
Channel Mapping Family for Ambisonics
...padding as a place to store extra side > information in the past. I haven't thought deeply about the trade-offs > between that and other approaches, like using an invalid TOC sequence to add > additional packet data, as we did with the MPEG TS embedding > (<https://wiki.xiph.org/OpusTS>). > > The difficulty with padding is that it prevents transparent repacketization, > because the padding occurs once per Opus packet, while side information is > typically required once per Opus frame (of which there can be several in an > Opus packet). The invalid TOC sequence...