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US 2012/0069921 A1Published application
Apparatus and method for encoding/decoding a multichannel signal
AssigneeSamsung Electronics Co., Ltd.
InventorsMi Young Kim, Jung Hoe Kim, Hwan Shim, Eun Mi Oh
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Abstract
An apparatus for encoding/decoding a multichannel signal. The apparatus for encoding/decoding a multichannel signal processes phase parameters for phase information among a plurality of channels constituting the multichannel signal in consideration of the characteristics of the multichannel signal. The apparatus generates an encoded bit stream for the multichannel signal using the processed phase parameters and the mono signal extracted from the multichannel signal.
Claims44
An encoding apparatus, comprising:
- a parameter extraction unit to extract a plurality of parameters indicating a characteristic relation among a plurality of channels constituting a multi-channel signal;
- a parameter modification unit to modify a phase parameter associated with phase information between the plurality of channels, among the plurality of parameters;
- a parameter encoding unit to encode the plurality of parameters including the modified phase parameter;
- a mono signal encoding unit to encode a mono signal obtained by down-mixing the multi-channel signal;
- and
- a bitstream generation unit to generate a bitstream where the multi-channel signal is encoded, using the encoded plurality of parameters and the encoded mono signal.
3 more elements
An encoding apparatus, comprising:
- a parameter extraction unit to extract a plurality of parameters indicating a characteristic relation among a plurality of channels constituting a multi-channel signal;
- and
- a parameter encoding unit to determine whether to encode a phase parameter associated with phase information between the plurality of channels among the plurality of parameters, and to encode the plurality of parameters including the phase parameter when it is determined to encode the phase parameter.
An encoding apparatus, comprising:
- a parameter extraction unit to extract a plurality of parameters indicating a characteristic relation among a plurality of channels constituting a multi-channel signal;
- a parameter encoding unit to quantize the plurality of parameters and to encode the quantized plurality of parameters;
- a mono signal encoding unit to encode a mono signal obtained by down-mixing the multi-channel signal;
- and
- a bitstream generation unit to generate a bitstream where the multi-channel signal is encoded, using the encoded plurality of parameters and the encoded mono signal,
- wherein the extracted plurality of parameters comprise a phase parameter associated with phase information between the plurality of channels included in the multi-channel signal, and
- wherein the parameter encoding unit determines a quantization type of the phase parameter, based on a continuity of phase information among a plurality of frames included in the multi-channel signal.
4 more elements
A decoding apparatus, comprising:
- a parameter modification unit to modify a parameter associated with a phase difference between a multi-channel signal and a mono signal, the mono signal being a down-mix signal of the multi-channel signal;
- and
- an up-mixing unit to up-mix the mono signal using the modified parameter.
A decoding apparatus, comprising:
- a mono signal decoding unit to restore a mono signal from a bitstream where the multi-channel signal is encoded, the mono signal being a down-mix signal of the multi-channel signal;
- a parameter decoding unit to restore, from the bitstream, a quantized first phase parameter associated with phase information between a plurality of channels constituting the multi-channel signal, and quantization type information of the quantized first phase parameter, to inverse-quantize the quantized first phase parameter based on the quantization type information, and to compute a second phase parameter;
- and
- an up-mixing unit to up-mix the mono signal using the second phase parameter.
1 more element
An encoding apparatus, comprising:
- a parameter extraction unit to extract a plurality of parameters indicating a characteristic relation among a plurality of channels constituting a multi-channel signal;
- a parameter modification unit to modify a phase parameter associated with phase information between the plurality of channels, among the plurality of parameters;
- a down-mixing unit to down-mix the multi-channel signal using the modified phase parameter, and to generate a mono signal;
- and
- a bitstream generation unit to generate a bitstream by encoding the generated mono signal and the plurality of parameters other than the modified phase parameter.
2 more elements
An encoding method, comprising:
- extracting, by a processor, a plurality of parameters indicating a characteristic relation among a plurality of channels constituting a multi-channel signal;
- modifying a phase parameter associated with phase information between the plurality of channels, among the plurality of parameters;
- down-mixing the multi-channel signal using the modified phase parameter, and generating a mono signal;
- and
- generating a bitstream by encoding the generated mono signal and the plurality of parameters other than the modified phase parameter.
2 more elements
A decoding method, comprising:
- modifying, by a processor, a parameter associated with a phase difference between a multi-channel signal and a mono signal, the mono signal being a down-mix signal of the multi-channel signal;
- and
- up-mixing the mono signal using the modified parameter.
A decoding method, comprising:
- restoring, by a processor, a mono signal from a bitstream;
- restoring an Overall Phase Difference (OPD) from the bitstream;
- estimating the Overall Phase Difference (OPD);
- modifying the OPD;
- and
- up-mixing the mono signal.
3 more elements
Dependencies are inferred from the claim text.