Encoding device and encoding method
AssigneePanasonic Intellectual Property Corporation of America
InventorsYuichi Kamiya, Takuya Kawashima, Hiroyuki Ehara, Akira Harada
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Abstract
An encoding device includes a control circuit which, when it has been determined that an input stereo signal is suitable to be encoded using a mid-side stereo technique, decides, according to a condition, whether to convert the input stereo signal into a mid-side signal in a time domain and apply first encoding or apply second encoding; a first encoding circuit that encodes the mid-side signal when the first encoding is to be applied; and a second encoding circuit that encodes the input stereo signal in a frequency domain when the second encoding is to be applied.
Claims11
An encoding apparatus, comprising:
- control circuitry, which, in operation, determines, when determining that an input stereo signal is suitable for encoding using a mid-side stereo scheme, either conversion of the input stereo signal into a mid-side signal in a time domain and application of first encoding or application of second encoding, depending on a condition;
- first encoding circuitry, which, in operation, encodes the mid-side signal when the first encoding is applied;
- and
- second encoding circuitry, which, in operation, encodes the input stereo signal in a frequency domain when the second encoding is applied,
- wherein the determination is based on whether a percentage of bands determined to use the mid-side stereo scheme among a plurality of bands of a frequency spectrum of the input stereo signal is greater than or equal to a threshold, or whether the mid-side stereo scheme is determined to be used in all of the plurality of bands.
An encoding method, comprising:
- determining, by an encoding apparatus, when determining that an input stereo signal is suitable for encoding using a mid-side stereo scheme, either conversion of the input stereo signal into a mid-side signal in a time domain and application of first encoding or application of second encoding, depending on a condition;
- encoding, by the encoding apparatus, the mid-side signal when the first encoding is applied;
- and
- encoding, by the encoding apparatus, the input stereo signal in a frequency domain when the second encoding is applied,
- wherein the determining is based on whether a percentage of bands determined to use the mid-side stereo scheme among a plurality of bands of a frequency spectrum of the input stereo signal is greater than or equal to a threshold, or whether the mid-side stereo scheme is determined to be used in all of the plurality of bands.
Dependencies are inferred from the claim text.