AES Convention Papers Forum

Enhanced Stereo Coding with Phase Parameters for MPEG Unified Speech and Audio Coding

Document Thumbnail

The proposed technology is concerned with a bit-efficient way to deliver phase information. This technology is to encode only inter-channel phase difference (IPD) parameter and to estimate overall phase difference (OPD) parameter at the decoder with transmitted inter-channel phase difference and channel level difference. The proposed technology reduces the bitrate for phase parameters compared to the case that both IPD parameters and OPD parameters are transmitted as specified in MPEG Parametric Stereo. The entropy coding scheme for phase parameters is improved utilizing the wrapping property of the phase parameters. We introduce phase smoothing at the decoder and adaptive control of quantization precision for phase parameters to minimize annoying artifact due to abrupt changes of quantized phase parameters. The proposed phase coding can improve stereo sound quality significantly and it was accepted as a part of MPEG-D USAC (Unified Speech and Audio Coding) standard.

AES Convention: Paper Number:
Publication Date:

Click to purchase paper as a non-member or you can login as an AES member to see more options.

No AES members have commented on this paper yet.

Subscribe to this discussion

RSS Feed To be notified of new comments on this paper you can subscribe to this RSS feed. Forum users should login to see additional options.

Start a discussion!

If you would like to start a discussion about this paper and are an AES member then you can login here:

If you are not yet an AES member and have something important to say about this paper then we urge you to join the AES today and make your voice heard. You can join online today by clicking here.

AES - Audio Engineering Society