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AssigneeSamsung Electronics Co., Ltd.
InventorsAnton Porov, Konstantin Osipov, Ki-hyun Choo
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Provided is an audio encoding method. The audio encoding method includes: acquiring envelopes based on a predetermined sub-band for an audio spectrum; quantizing the envelopes based on the predetermined sub-band; and obtaining a difference value between quantized envelopes for adjacent sub-bands and lossless encoding a difference value of a current sub-band by using a difference value of a previous sub-band as a context. Accordingly, the number of bits required to encode envelope information of an audio spectrum may be reduced in a limited bit range, thereby increasing the number of bits required to encode an actual spectral component.
An audio encoding method comprising:
An audio encoding apparatus comprising:
An audio decoding method comprising:
An audio decoding apparatus comprising:
A multimedia device comprising an encoding module to acquire envelopes based on a predetermined sub-band for an audio spectrum, to quantize the envelopes based on the predetermined sub-band, to obtain a difference value between quantized envelopes for adjacent sub-bands, and to lossless encode a difference value of a current sub-band by using a difference value of a previous sub-band as a context.
A multimedia device comprising a decoding module to obtain a difference value between quantized envelopes for adjacent sub-bands from a bitstream, to lossless decode a difference value of a current sub-band by using a difference value of a previous sub-band as a context, and to perform dequantization by obtaining quantized envelopes based on a sub-band from the difference value of the current sub-band reconstructed as a result of the lossless decoding.
A multimedia device comprising:
Dependencies are inferred from the claim text.