AV1 Compression: Audio Nears Half of High-Efficiency File Sizes
Streaming engineers are discussing how audio tracks comprise nearly half the file size in high-compression AV1 video, creating a storage bottleneck. While Opus is the current audio codec standard, there is interest in neural codecs to further reduce audio data and match the efficiency of video compression. This conversation highlights a technical challenge in improving overall streaming efficiency.
Key Takeaways
- Audio can constitute nearly 50% of the file size in high-compression AV1 video streams.
- Engineers identify this audio contribution as a storage bottleneck for extreme compression scenarios.
- Opus is the current default audio codec, but it leaves 'more room' for improvement.
- Interest is growing in neural codecs to enhance audio compression and match video efficiency.
Why It Matters
As AV1 adoption grows for bandwidth efficiency, the relative size of audio streams becomes a significant factor in overall delivery costs and performance. This technical discussion signals a focus shift toward audio codec innovation, which has historically lagged behind video in perceived urgency. If neural codecs can deliver substantial improvements, they could free up significant storage and bandwidth, impacting content delivery networks and consumer playback experiences. Watch for advancements in audio compression techniques, particularly those leveraging AI, to become a more prominent area of investment.
Read full article at news.ycombinator.com
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