Frequency-based coding of audio channels in parametric multi-channel coding systems
CA 2557993 C · Owner: Avago Technologies General Ip (Singapore) Pte. Ltd. · Inventors: Herre, Juergen; Faller, Christof
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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For a multi-channel audio signal, parametric coding is applied to different subsets of audio input channels for different frequency regions. For example for a 5.1 surround sound signal having five regular channels and one lowfrequency (LFE) channel, binaural cue coding (BCC) can be applied to all six audio channels for sub-bands at or below a specified cut-off frequency but to , only five audio channels (excluding the LFE channel) for sub-bands above the cut-off frequency. Such frequency-based coding of channels can reduce the encoding and decoding processing loads and/or size of the encoded audio bitstream relative to parametric coding techniques that are applied to all input …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
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- Filed February 23, 2005 and granted November 27, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 23, 2025.
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