Decoder for variable-number of channel presentation of multidimensional sound fields
First Claim
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1. A decoder comprising:
- receiving means for receiving a plurality of delivery channels of formatted subband information,deformatting means responsive to said receiving means for generating a deformatted representation of said subband information in response to each delivery channel,distribution means responsive to said deformatting means for generating one or more intermediate signals, wherein at least one intermediate signal is generated by combining subband information from two or more of said deformatted representations, andsynthesis means for generating a respective output signal in response to each of said intermediate signals.
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Abstract
The invention relates to the reproduction of high-fidelity multi-dimensional sound fields intended for human hearing. More particularly, the invention relates to the decoding of signals representing such sound fields delivered by one or more delivery channels, but played back over a number of presentation channels which may differ from the number of delivery channels. In one embodiment, a subband decoder combines spectral information in the frequency domain prior to inverse filtering, thereby incurring implementation costs roughly proportional to the number of presentation channels rather than to the number of delivery channels.
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10 Claims
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1. A decoder comprising:
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receiving means for receiving a plurality of delivery channels of formatted subband information, deformatting means responsive to said receiving means for generating a deformatted representation of said subband information in response to each delivery channel, distribution means responsive to said deformatting means for generating one or more intermediate signals, wherein at least one intermediate signal is generated by combining subband information from two or more of said deformatted representations, and synthesis means for generating a respective output signal in response to each of said intermediate signals. - View Dependent Claims (2, 5, 6)
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3. A decoder comprising:
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receiving means for receiving one or more delivery channels of formatted subband information, deformatting means responsive to said receiving means for generating a deformatted representation of said subband information in response to each delivery channel, distribution means responsive to said deformatting means for generating a plurality of intermediate signals, wherein at least two intermediate signals are generated by apportioning subband information from at least one deformatted representation, and synthesis means for generating a respective output signal in response to each of said intermediate signals. - View Dependent Claims (4)
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7. A decoding method comprising:
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receiving a plurality of delivery channels of formatted subband information, generating a deformatted representation of said subband information in response to each delivery channel, generating one or more intermediate signals in response to said deformatted representations, wherein at least one intermediate signal is generated by combining subband information from two or more of said deformatted representations, and generating a respective output signal in response to each of said intermediate signals. - View Dependent Claims (8, 9, 10)
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Specification