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    • 31. 发明申请
    • AUDIO ENCODING METHOD AND SYSTEM FOR GENERATING A UNIFIED BITSTREAM DECODABLE BY DECODERS IMPLEMENTING DIFFERENT DECODING PROTOCOLS
    • 用于生成实现不同解码协议的解码器可解码的统一比特流的音频编码方法和系统
    • WO2012138819A3
    • 2012-12-20
    • PCT/US2012032252
    • 2012-04-05
    • DOLBY LAB LICENSING CORPDOLBY INT ABRIEDMILLER JEFFREY CFARAHANI FARHADSCHUG MICHAELRADHAKRISHNAN REGUNATHANVINTON MARK S
    • RIEDMILLER JEFFREY CFARAHANI FARHADSCHUG MICHAELRADHAKRISHNAN REGUNATHANVINTON MARK S
    • G10L19/14
    • G10L19/002G10L19/167
    • In a class of embodiments, an audio encoding system (typically, a perceptual encoding system that is configured to generate a single ("unified") bitstream that is compatible with (i.e., decodable by) a first decoder configured to decode audio data encoded in accordance with a first encoding protocol (e.g., the multichannel Dolby Digital Plus, or DD+, protocol) and a second decoder configured to decode audio data encoded in accordance with a second encoding protocol (e.g., the stereo AAC, HE AAC v1, or HE AAC v2 protocol). The unified bitstream can include both encoded data (e.g., bursts of data) decodable by the first decoder (and ignored by the second decoder) and encoded data (e.g., other bursts of data) decodable by the second decoder (and ignored by the first decoder). In effect, the second encoding format is hidden within the unified bitstream when the bitstream is decoded by the first decoder, and the first encoding format is hidden within the unified bitstream when the bitstream is decoded by the second decoder. The format of the unified bitstream generated in accordance with the invention may eliminate the need for transcoding elements throughout an entire media chain and/or ecosystem. Other aspects of the invention are an encoding method performed by any embodiment of the inventive encoder, a decoding method performed by any embodiment of the inventive decoder, and a computer readable medium (e.g., disc) which stores code for implementing any embodiment of the inventive method.
    • 在一类实施例中,音频编码系统(典型地,被配置为生成与第一解码器兼容(即可解码)的单个(“统一”)比特流的感知编码系统被配置为解码在 根据第一编码协议(例如,多声道Dolby Digital Plus或DD +协议)和第二解码器,第二解码器被配置为解码根据第二编码协议编码的音频数据(例如,立体声AAC,HE AAC v1或HE AAC v2协议),统一比特流可以包括可由第一解码器解码(并且被第二解码器忽略)和可由第二解码器解码的编码数据(例如,其他数据突发)的编码数据(例如,数据的突发) 并且被第一解码器忽略)实际上,当比特流被第一解码器解码时,第二编码格式被隐藏在统一比特流内,并且当比特流被隐藏在统一比特流内时,第一编码格式被隐藏 由第二解码器解码。 根据本发明生成的统一比特流的格式可以消除在整个媒体链和/或生态系统中对转码元件的需要。 本发明的其他方面是由本发明的编码器的任何实施例执行的编码方法,由本发明的解码器的任何实施例执行的解码方法,以及存储用于实现本发明的任何实施例的代码的计算机可读介质(例如,盘) 方法。
    • 33. 发明申请
    • REDUCED COMPLEXITY CONVERTER SNR CALCULATION
    • 降低复杂度转换器SNR计算
    • WO2014072260A3
    • 2014-07-10
    • PCT/EP2013072961
    • 2013-11-04
    • DOLBY INT ABDOLBY LAB LICENSING CORP
    • SCHUG MICHAELWILLIAMS PHILLIP
    • G10L19/032G10L19/16
    • G10L19/008G10L19/02G10L19/032G10L19/173
    • 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.
    • 本文件涉及音频编码/解码。 特别地,本文件涉及用于降低在音频编码/解码的上下文中使用的比特分配过程的复杂度的方法和系统。 描述了被配置为根据第一音频编解码器系统对音频信号进行编码的音频编码器(300)。 音频编码器(300)包括被配置为基于音频信号确定一组频谱系数(312)的变换单元(302)。 此外,编码器(300)包括浮点编码单元(304),其被配置为基于频谱系数集合(312)确定一组比例因子和一组缩放值(314); 并编码一组比例因子以产生一组经编码的比例因子(313)。 另外,编码器(300)包括位分配和量化单元(305,306),其被配置为基于第一目标数据速率和基于所述量化单元确定用于量化所述一组缩放值(314)的可用比特的总数 关于用于编码比例因子集合的位数(313); 以确定指示用于量化所述一组缩放值(314)的所述缩放值的可用比特的总数的分配的第一控制参数(315)。 并且根据第一控制参数(315)量化缩放值集合(314)以产生一组量化缩放值(317)。 此外,编码器(300)包括被配置为基于第一控制参数(315)确定第二控制参数(321)的代码转换模拟单元(320)。 其中所述第二控制参数(321)使得代码转换器能够以第二目标数据速率将所述第一比特流转换为第二比特流; 其中所述第二位流符合与所述第一音频编解码器系统不同的第二音频编解码器系统; 并且其中所述第一比特流包括所述第二控制参数。
    • 34. 发明申请
    • METHODS AND SYSTEMS FOR EFFICIENT RECOVERY OF HIGH FREQUENCY AUDIO CONTENT
    • 高频音频内容有效恢复的方法与系统
    • WO2013124445A3
    • 2013-11-21
    • PCT/EP2013053609
    • 2013-02-22
    • DOLBY INT AB
    • THESING ROBINSCHUG MICHAEL
    • G10L21/0388
    • G10L19/008G10L19/0204G10L19/028G10L19/167G10L21/0388
    • The present document relates to the technical field of audio coding, decoding and processing. It specifically relates to methods of recovering high frequency content of an audio signal from low frequency content of the same audio signal in an efficient manner. A method for determining a first banded tonality value (311, 312) for a first frequency subband (205) of an audio signal is described. The first banded tonality value (311, 312) is used for approximating a high frequency component of the audio signal based on a low frequency component of the audio signal. The method comprises determining a set of transform coefficients in a corresponding set of frequency bins based on a block of samples of the audio signal; determining a set of bin tonality values (341 ) for the set of frequency bins using the set of transform coefficients, respectively; and combining a first subset of two or more of the set of bin tonality values (341) for two or more corresponding adjacent frequency bins of the set of frequency bins lying within the first frequency subband, thereby yielding the first banded tonality value (311, 312) for the first frequency subband.
    • 本文件涉及音频编码,解码和处理技术领域。 具体涉及以有效的方式从相同音频信号的低频内容中恢复音频信号的高频内容的方法。 描述了一种用于确定音频信号的第一频率子带(205)的第一带状音调值(311,312)的方法。 第一带状音调值(311,312)用于基于音频信号的低频分量近似音频信号的高频分量。 该方法包括基于音频信号的样本块来确定频率组的相应集合中的一组变换系数; 使用所述变换系数集合分别确定所述频率组集合的一组bin音调值(341); 以及将位于所述第一频率子带内的所述频率组集合中的两个或更多个对应的相邻频率块的所述组音调值集合(341)中的两个或更多个的第一子集合,从而产生所述第一带状音调值(311, 312)用于第一频率子带。
    • 36. 发明专利
    • Procedimientos y sistemas para recuperar de manera eficiente contenido de audio de alta frecuencia
    • ES2568640T3
    • 2016-05-03
    • ES13705503
    • 2013-02-22
    • DOLBY INT AB
    • THESING ROBINSCHUG MICHAEL
    • G10L19/02G10L21/0388
    • Un procedimiento para determinar un primer valor de tonalidad por banda (311, 312) para una primera subbanda de frecuencia (205) de una señal de audio, donde el primer valor de tonalidad por banda (311, 312) se usa para aproximar una componente de alta frecuencia de la señal de audio en función de una componente de baja frecuencia de la señal de audio, comprendiendo el procedimiento: - determinar un conjunto de coeficientes de transformada en un conjunto correspondiente de celdas de frecuencia en función de un bloque de muestras de la señal de audio; - determinar un conjunto de valores de tonalidad de celda (341) para el conjunto de celdas de frecuencia usando el conjunto de coeficientes de transformada, respectivamente; y - combinar un primer subconjunto de dos o más del conjunto de valores de tonalidad de celda (341) para dos o más celdas de frecuencia adyacentes correspondientes del conjunto de celdas de frecuencia que están dentro de la primera subbanda de frecuencia, obteniéndose así el primer valor de tonalidad por banda (311, 312) para la primera subbanda de frecuencia; en el que - el procedimiento comprende además determinar una secuencia de conjuntos de coeficientes de transformada en función de una secuencia correspondiente de bloques de la señal de audio; - para una celda de frecuencia particular, la secuencia de conjuntos de coeficientes de transformada comprende una secuencia de coeficientes de transformada particulares; - determinar el valor de tonalidad de celda (341) para la celda de frecuencia particular comprende: - determinar una secuencia de fases en función de la secuencia de coeficientes de transformada particulares; y - determinar una aceleración de fase en función de la secuencia de fases; y - el valor de tonalidad de celda (341) para la celda de frecuencia particular depende de la aceleración de fase.
    • 39. 发明专利
    • АУТЕНТИФИКАЦИЯ ПОТОКОВ ДАННЫХ
    • RU2509424C2
    • 2014-03-10
    • RU2012107995
    • 2010-08-06
    • DOLBY INT AB
    • BOEHM REINHOLDGROESCHEL ALEXANDERHOERICH HOLGERHOMM DANIELSCHILDBACH WOLFGANG ASCHUG MICHAELWATZKE OLIVERWOLTERS MARTINZIEGLER THOMAS
    • H04L9/32
    • Настоящееизобретениеотноситсяк технологиямаутентификациипотоковданных, аименнок вставкеидентификаторовв такойпотокданных, какбитовыйпоток Dolby Pulse, AAC или HE AAC, ик аутентификациии верификациипотокаданныхнаосновеуказанныхидентификаторов. Техническийрезультатзаключаетсяв обеспеченииспособностиделатьразличиемеждупотокомданных, илибитовымпотоком, илибитовымпотоком, которыйгенерируетсясоответствующимкодером Dolby Pulse, ипотокомданных, илибитовымпотоком, которыйгенерируетсялюбымпроизвольнымкодером, совместимымс HE-AACv2. Техническийрезультатдостигаетсязасчетсозданияспособаи системыдлядекодированияпотокаданных, включающегорядкадровданных, гдеспособвключаетэтапгенерированиякриптографическойвеличиныдляблокаиз N последовательныхкадровданныхи информациио конфигурации, отличающийсятем, чтоинформацияо конфигурациивключаетинформациюдлярендерингапотокаданных; затемспособвставляеткриптографическуювеличинув потокданных, следующийза N последовательнымикадрамиданных. 12 н. и 26 з.п. ф-лы, 8 ил.