Proposed: Improving Jitter-Buffer Implementation for Voice Chat in V-Sekai Projects

Metadata

  • Status: proposed
  • Deciders: V-Sekai, lyuma, Dreadpon,
  • Tags: V-Sekai, GPT-4, jitter-buffer, voice-chat, godot-speech, audio-quality, adaptive-jitter-buffer, Speex

Context and Problem Statement

Dreadpon is working on a voice chat solution inside Godot 3.5.2 and found the jitter-buffer implementation in godot-speech to be rudimentary. They are looking for an ideal jitter-buffer implementation that can handle both slowing down and speeding up played audio.

Proposed Solution

Use the adaptive jitter buffer from the Speex source code as a starting point, with modifications to address its limitations:

  1. Capture packets as they are being dropped from the jitter buffer.
  2. Ensure all captured packets are played.
  3. Implement a playback buffer to speed up the audio when necessary.

Implementation

  1. Integrate the adaptive jitter buffer from the Speex source code into the godot-speech project.
  2. Modify the jitter buffer to capture dropped packets and store them in a separate buffer.
  3. Implement a playback buffer that accelerates audio playback when more audio packets are available.
  4. Test the new implementation to ensure it handles jitter compensation effectively.

Positive Consequences

  • Improved jitter compensation in the voice chat solution.
  • Better handling of packet drops and audio acceleration.
  • Enhanced overall audio quality in the voice chat system.

Negative Consequences

  • Additional complexity in the godot-speech codebase.
  • Potential performance impact due to the added buffering mechanism.

Option graveyard

  • Continue using the current rudimentary jitter-buffer implementation in godot-speech.

If this enhancement will be used infrequently, can it be worked around with a few lines of script?

No, this enhancement is essential for a high-quality voice chat solution and cannot be easily worked around with a few lines of script.

Is there a reason why this should be core and done by us?

Yes, improving the jitter-buffer implementation is crucial for providing a reliable and high-quality voice chat experience in V-Sekai projects.

References