IN2015DN04001A - - Google Patents

Info

Publication number
IN2015DN04001A
IN2015DN04001A IN4001DEN2015A IN2015DN04001A IN 2015DN04001 A IN2015DN04001 A IN 2015DN04001A IN 4001DEN2015 A IN4001DEN2015 A IN 4001DEN2015A IN 2015DN04001 A IN2015DN04001 A IN 2015DN04001A
Authority
IN
India
Prior art keywords
control parameter
audio
scaled values
encoder
bitstream
Prior art date
Application number
Inventor
Michael Schug
Phillip Williams
Original Assignee
Dolby Int Ab
Dolby Lab Licensing Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dolby Int Ab, Dolby Lab Licensing Corp filed Critical Dolby Int Ab
Publication of IN2015DN04001A publication Critical patent/IN2015DN04001A/en

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/008—Multichannel audio signal coding or decoding using interchannel correlation to reduce redundancy, e.g. joint-stereo, intensity-coding or matrixing
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/02—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders
    • G10L19/032—Quantisation or dequantisation of spectral components
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/02—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/02—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders
    • G10L19/03—Spectral prediction for preventing pre-echo; Temporary noise shaping [TNS], e.g. in MPEG2 or MPEG4
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
    • G10L19/16—Vocoder architecture
    • G10L19/173—Transcoding, i.e. converting between two coded representations avoiding cascaded coding-decoding

Abstract

The present document relates to audio encoding / decoding. In particular the present document relates to a method and system for reducing the complexity of a bit allocation process used in the context of audio encoding / decoding. An audio encoder (300) configured to encode an audio signal according to a first audio codec system is described. The audio encoder (300) comprises a transform unit (302) configured to determine a set of spectral coefficients (312) based on the audio signal. Furthermore the encoder (300) comprises a floating point encoding unit (304) configured to determine a set of scale factors and a set of scaled values (314) based on the set of spectral coefficients (312); and to encode the set of scale factors to yield a set of encoded scale factors (313). In addition the encoder (300) comprises a bit allocation and quantization unit (305 306) configured to determine a total number of available bits for quantizing the set of scaled values (314) based on a first target data rate and based on the number of bits used for the set of encoded scale factors (313); to determine a first control parameter (315) indicative of an allocation of the total number of available bits for quantizing the scaled values of the set of scaled values (314); and to quantize the set of scaled values (314) in accordance to the first control parameter (315) to yield a set of quantized scaled values (317). Furthermore the encoder (300) comprises a transcoding simulation unit (320) configured to determine a second control parameter (321) based on the first control parameter (315); wherein the second control parameter (321) enables a transcoder to convert the first bitstream into a second bitstream at a second target data rate; wherein the second bitstream accords to a second audio codec system different from the first audio codec system; and wherein the first bitstream comprises the second control parameter.
IN4001DEN2015 2012-11-07 2013-11-04 IN2015DN04001A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201261723687P 2012-11-07 2012-11-07
PCT/EP2013/072961 WO2014072260A2 (en) 2012-11-07 2013-11-04 Reduced complexity converter snr calculation

Publications (1)

Publication Number Publication Date
IN2015DN04001A true IN2015DN04001A (en) 2015-10-02

Family

ID=49517525

Family Applications (1)

Application Number Title Priority Date Filing Date
IN4001DEN2015 IN2015DN04001A (en) 2012-11-07 2013-11-04

Country Status (8)

Country Link
US (2) US9378748B2 (en)
EP (1) EP2917909B1 (en)
JP (2) JP6113294B2 (en)
KR (1) KR101726205B1 (en)
CN (1) CN104781878B (en)
IN (1) IN2015DN04001A (en)
RU (1) RU2610588C2 (en)
WO (1) WO2014072260A2 (en)

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Also Published As

Publication number Publication date
JP6474845B2 (en) 2019-02-27
US9208789B2 (en) 2015-12-08
CN104781878A (en) 2015-07-15
EP2917909B1 (en) 2018-10-31
CN104781878B (en) 2018-03-02
EP2917909A2 (en) 2015-09-16
JP6113294B2 (en) 2017-04-12
JP2017138610A (en) 2017-08-10
RU2015116854A (en) 2016-11-27
US20150269950A1 (en) 2015-09-24
JP2015532981A (en) 2015-11-16
KR101726205B1 (en) 2017-04-12
WO2014072260A3 (en) 2014-07-10
KR20150066565A (en) 2015-06-16
BR112015010023A2 (en) 2017-07-11
WO2014072260A2 (en) 2014-05-15
RU2610588C2 (en) 2017-02-13
US9378748B2 (en) 2016-06-28
US20140188488A1 (en) 2014-07-03

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