Invention Grant
- Patent Title: MDCT-based complex prediction stereo coding
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Application No.: US15670709Application Date: 2017-08-07
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Publication No.: US10347260B2Publication Date: 2019-07-09
- Inventor: Heiko Purnhagen , Pontus Carlsson , Lars Villemoes
- Applicant: Dolby International AB
- Applicant Address: NL Amsterdam Zuidoost
- Assignee: Dolby International AB
- Current Assignee: Dolby International AB
- Current Assignee Address: NL Amsterdam Zuidoost
- Main IPC: H04S3/00
- IPC: H04S3/00 ; G10L19/02 ; G10L19/06 ; G10L19/16 ; G10L25/12 ; G10L19/008

Abstract:
The invention provides methods and devices for stereo encoding and decoding using complex prediction in the frequency domain. In one embodiment, a decoding method, for obtaining an output stereo signal from an input stereo signal encoded by complex prediction coding and comprising first frequency-domain representations of two input channels, comprises the upmixing steps of: (i) computing a second frequency-domain representation of a first input channel; and (ii) computing an output channel on the basis of the first and second frequency-domain representations of the first input channel, the first frequency-domain representation of the second input channel and a complex prediction coefficient. The upmixing can be suspended responsive to control data.
Public/Granted literature
- US20170365261A1 MDCT-Based Complex Prediction Stereo Coding Public/Granted day:2017-12-21
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