Invention Grant
- Patent Title: MDCT-based complex prediction stereo coding
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Application No.: US17560295Application Date: 2021-12-23
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Publication No.: US11810582B2Publication Date: 2023-11-07
- 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: IE Dublin
- The original application number of the division: US13638898
- Main IPC: G10L19/008
- IPC: G10L19/008 ; G10L19/06 ; G10L19/18 ; H04S3/00 ; G10L19/02 ; G10L19/16 ; G10L25/12

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.
(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
- US20220180876A1 MDCT-BASED COMPLEX PREDICTION STEREO CODING Public/Granted day:2022-06-09
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