公开(公告)号：US20130179175A1

公开(公告)日：2013-07-11

申请号：US13588890

申请日：2012-08-17

申请人： Arijit Biswas ,  Vinay Melkote ,  Michael Schug ,  Grant A. Davidson ,  Mark S. Vinton

发明人： Arijit Biswas ,  Vinay Melkote ,  Michael Schug ,  Grant A. Davidson ,  Mark S. Vinton

IPC分类号： G10L19/00

CPC分类号： G10L19/028 ,  G10L19/0204 ,  G10L19/032 ,  G10L19/265

摘要： A method for determining mantissa bit allocation of frequency domain audio data to be encoded, including by performing adaptive low frequency compensation on each frequency band of a set of low frequency bands of the data. The low frequency compensation includes steps of: performing tonality detection on the audio data to generate compensation control data indicative of whether each frequency band in the set has prominent tonal content; and performing low frequency compensation on each frequency band in the set having prominent tonal content, including by correcting a preliminary masking value for each frequency band having prominent tonal content, but not performing low frequency compensation on the audio data in any other frequency band in the set. Other aspects are audio encoding methods including such tonality detection and low frequency compensation steps, and a system configured to perform any embodiment of the inventive method.

摘要翻译： 一种用于确定要编码的频域音频数据的尾数位分配的方法，包括通过对数据的一组低频带的每个频带执行自适应低频补偿。 低频补偿包括以下步骤：对音频数据执行音调检测，以产生指示该组中的每个频带是否具有突出的音调内容的补偿控制数据; 并且对具有突出音调内容的集合中的每个频带执行低频补偿，包括通过校正具有突出音调内容的每个频带的初步屏蔽值，但不对低频补偿中的任何其他频带中的音频数据执行低频补偿 组。 其他方面是包括这种音调检测和低频补偿步骤的音频编码方法，以及被配置为执行本发明方法的任何实施例的系统。

公开(公告)号：US09378743B2

公开(公告)日：2016-06-28

申请号：US14009503

申请日：2012-04-05

申请人： Jeffrey C. Riedmiller ,  Farhad Farahani ,  Michael Schug ,  Regunathan Radhakrishnan ,  Mark S. Vinton

发明人： Jeffrey C. Riedmiller ,  Farhad Farahani ,  Michael Schug ,  Regunathan Radhakrishnan ,  Mark S. Vinton

IPC分类号： G10L19/008 ,  G10L19/002 ,  G10L19/16

CPC分类号： G10L19/002 ,  G10L19/167

摘要： 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.

摘要翻译： 在一类实施例中，音频编码系统（通常是感知编码系统，其被配置为生成与第一解码器兼容的（即可解码的）单个（“统一”）比特流，第一解码器被配置为对 根据第一编码协议（例如，多频道杜比数字+或DD +协议）和被配置为对根据第二编码协议（例如立体声AAC，HE AAC v1或HE）编码的音频数据进行解码的第二解码器 统一比特流可以包括可由第一解码器解码（并由第二解码器忽略）的可编码数据（例如，数据突发）和由第二解码器解码的编码数据（例如，其他数据突发） 并且被第一解码器忽略），实际上，当第一解码器对比特流进行解码时，第二编码格式被隐藏在统一比特流内，并且当比特流中第一编码格式被隐藏在统一比特流内时 令牌由第二解码器解码。 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/或生态系统中对代码转换元素的需要。 本发明的其他方面是由本发明编码器的任何实施例执行的编码方法，由本发明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。

公开(公告)号：US20140358554A1

公开(公告)日：2014-12-04

申请号：US14009503

申请日：2012-04-05

申请人： Jeffrey C. Riedmiller ,  Farhad Farahani ,  Michael Schug ,  Regunathan Radhakrishnan ,  Mark S. Vinton

发明人： Jeffrey C. Riedmiller ,  Farhad Farahani ,  Michael Schug ,  Regunathan Radhakrishnan ,  Mark S. Vinton

IPC分类号： G10L19/002

CPC分类号： G10L19/002 ,  G10L19/167

摘要： 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.

摘要翻译： 在一类实施例中，音频编码系统（通常是感知编码系统，其被配置为生成与第一解码器兼容的（即可解码的）单个（“统一”）比特流，第一解码器被配置为对 根据第一编码协议（例如，多频道杜比数字+或DD +协议）和被配置为对根据第二编码协议（例如立体声AAC，HE AAC v1或HE）编码的音频数据进行解码的第二解码器 统一比特流可以包括可由第一解码器解码（并由第二解码器忽略）的可编码数据（例如，数据突发）和由第二解码器解码的编码数据（例如，其他数据突发） 并且被第一解码器忽略），实际上，当第一解码器对比特流进行解码时，第二编码格式被隐藏在统一比特流内，并且当比特流中第一编码格式被隐藏在统一比特流内时 令牌由第二解码器解码。 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/或生态系统中对代码转换元素的需要。 本发明的其他方面是由本发明编码器的任何实施例执行的编码方法，由本发明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。

公开(公告)号：US07136418B2

公开(公告)日：2006-11-14

申请号：US09938119

申请日：2001-08-22

申请人： Les E. Atlas ,  Mark S. Vinton

发明人： Les E. Atlas ,  Mark S. Vinton

IPC分类号： H04B14/04 ,  H04J11/00 ,  H04L12/54 ,  G06K9/00

CPC分类号： G10L19/02

摘要： A method and system for encoding and decoding an input signal in relation to the most perceptually relevant aspects of the input signal. A two-dimensional (2D) transform is applied to the input signal to produce a magnitude matrix and a phase matrix that can be inverse quantized by a decoder. A first column of coefficients of the magnitude matrix represents a mean spectral density (MSD) function of the input signal. Relevant aspects of the MSD function are encoded at a beginning of a data packet. The MSD function is also processed through a core perception model to determine bit allocation. The matrices are then quantized and priority ordered into a data packet, with the least perceptually relevant information at the end of the packet so that it may be ignored or truncated for scalability to the channel data rate capacity.

公开(公告)号：US20120128159A1

公开(公告)日：2012-05-24

申请号：US13121323

申请日：2009-09-28

申请人： David S. McGrath ,  Mark S. Vinton

发明人： David S. McGrath ,  Mark S. Vinton

IPC分类号： H04R5/00

CPC分类号： H04S1/002 ,  H04S3/002 ,  H04S7/307

摘要： An improved decorrelator is disclosed that processes an input audio signal in two separate paths. In one path, a banded phase-flip filter is applied to lower frequencies of the input audio signal. In a second path, a frequency-dependent delay is applied to higher frequencies of the input audio signal. Signals from the two paths are combined to obtain an output signal that is psychoacoustically decorrelated with the input audio signal. The decorrelated signal can be mixed with the input audio signal without generating audible artifacts.

摘要翻译： 公开了一种改进的去相关器，其处理两个独立路径中的输入音频信号。 在一个路径中，带状相位倒相滤波器被施加到输入音频信号的较低频率。 在第二路径中，频率依赖的延迟被施加到输入音频信号的较高频率。 来自两个路径的信号被组合以获得与输入音频信号心理声学去相关的输出信号。 解相关信号可以与输入音频信号混合，而不会产生可听见的伪影。

公开(公告)号：US08885836B2

公开(公告)日：2014-11-11

申请号：US13121323

申请日：2009-09-28

申请人： David S. McGrath ,  Mark S. Vinton

发明人： David S. McGrath ,  Mark S. Vinton

IPC分类号： H04R5/00 ,  H04S1/00 ,  H04S3/00 ,  H04S7/00

CPC分类号： H04S1/002 ,  H04S3/002 ,  H04S7/307

摘要： An improved decorrelator is disclosed that processes an input audio signal in two separate paths. In one path, a banded phase-flip filter is applied to lower frequencies of the input audio signal. In a second path, a frequency-dependent delay is applied to higher frequencies of the input audio signal. Signals from the two paths are combined to obtain an output signal that is psychoacoustically decorrelated with the input audio signal. The decorrelated signal can be mixed with the input audio signal without generating audible artifacts.

摘要翻译： 公开了一种改进的去相关器，其处理两个独立路径中的输入音频信号。 在一个路径中，带状相位倒相滤波器被施加到输入音频信号的较低频率。 在第二路径中，频率依赖的延迟被施加到输入音频信号的较高频率。 来自两个路径的信号被组合以获得与输入音频信号心理声学去相关的输出信号。 解相关信号可以与输入音频信号混合，而不会产生可听见的伪影。

公开(公告)号：US20140214431A1

公开(公告)日：2014-07-31

申请号：US14126895

申请日：2012-06-27

申请人： Mark S. Vinton ,  Charles Q. Robinson

发明人： Mark S. Vinton ,  Charles Q. Robinson

IPC分类号： G10L19/00

CPC分类号： G10L19/0017 ,  G10L19/24

摘要： A transmitter in an audio coding system generates an encoded audio signal that conveys a losslessly encoded representation of an audio signal at a first sample rate and losslessly encoded representations of related audio information at other sample rates. A companion receiver with limited computational resources can generate a high-quality output audio signal at a desired sample rate by losslessly decoding the encoded representation of the audio signal and possibly other portions of the encoded audio signal as needed to obtain an output signal at one of the other sample rates.

摘要翻译： 音频编码系统中的发射机产生编码的音频信号，其以第一采样率传送音频信号的无损编码表示，并以其它采样率对相关音频信息进行无损编码表示。 具有有限计算资源的伴随接收机可以通过对音频信号的编码表示和可能的编码音频信号的其它部分进行无损解码来以期望的采样率生成高质量的输出音频信号，以便在以下之一获得输出信号 其他采样率。