Efficient and scalable parametric stereo coding for low bitrate applications
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United States of America Patent
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Jan 9, 2018
Issued Date -
N/A
app pub date -
Mar 14, 2017
filing date -
Jul 10, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention provides improvements to prior art audio codecs that generate a stereo-illusion through post-processing of a received mono signal. These improvements are accomplished by extraction of stereo-image describing parameters at the encoder side, which are transmitted and subsequently used for control of a stereo generator at the decoder side. Furthermore, the invention bridges the gap between simple pseudo-stereo methods, and current methods of true stereo-coding, by using a new form of parametric stereo coding. A stereo-balance parameter is introduced, which enables more advanced stereo modes, and in addition forms the basis of a new method of stereo-coding of spectral envelopes, of particular use in systems where guided HFR (High Frequency Reconstruction) is employed. As a special case, the application of this stereo-coding scheme in scalable HFR-based codecs is described.
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| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Jul 9, 2025 |
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