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Application filed by Ericsson Telefon Ab L MfiledCriticalEricsson Telefon Ab L M
Priority claimed from PCT/SE2015/050531external-prioritypatent/WO2015174912A1/en
Publication of MX2016014335ApublicationCriticalpatent/MX2016014335A/en
Publication of MX353486BpublicationCriticalpatent/MX353486B/en
Compression, Expansion, Code Conversion, And Decoders
(AREA)
Abstract
The invention relates to a codec and a signal classifier and methods therein for signal classification and selection of a coding mode based on audio signal characteristics. A method embodiment to be performed by a decoder comprises, for a frame m: determining a stability value D(m) based on a difference, in a transform domain, between a range of a spectral envelope of frame m and a corresponding range of a spectral envelope of an adjacent frame m-1. Each such range comprises a set of quantized spectral envelope values related to the energy in spectral bands of a segment of the audio signal. The method further comprises selecting a decoding mode, out of a plurality of decoding modes, based on the stability value D(m); and applying the selected decoding mode.
MX2016014335A2015-05-122015-05-12Audio signal classification and coding.
MX353486B
(en)
Apparatus and method for audio signal envelope encoding, processing and decoding by splitting the audio signal envelope employing distribution quantization and coding
Machines and methods for encoding, processing, and decoding envelopes of audio signal by separating the envelope of the audio signal using quantization. Distribution and Coding