公开(公告)号：WO2018200426A1

公开(公告)日：2018-11-01

申请号：PCT/US2018/028987

申请日：2018-04-24

Applicant: DTS, INC.

Inventor： CHAU, Albert ,  KALKER, Antonius ,  SEROUSSI, Gadiel

IPC: G10L19/24

Abstract: An audio encoder can parse a digital audio signal into a plurality of frames, each frame including a specified number of audio samples, perform a transform of the audio samples of each frame to produce a plurality of frequency-domain coefficients for each frame, partition the plurality of frequency-domain coefficients for each frame into a plurality of bands for each frame, each band having a reshaping parameter that represents a time resolution and a frequency resolution, and encode the digital audio signal to a bit stream that includes the reshaping parameters. For a first band, the reshaping parameter can be encoded using a first alphabet size. For a second band, the reshaping parameter can be encoded using a second alphabet size different from the first alphabet size. Using different alphabet sizes can allow for more compact compression in the bit stream.

公开(公告)号：WO2018044897A9

公开(公告)日：2018-03-08

申请号：PCT/US2017/049130

申请日：2017-08-29

Applicant: DTS, INC.

Inventor： SEROUSSI, Gadiel ,  MARTIN, Alvaro

IPC: G10L19/00 ,  G10L19/02 ,  G10L19/038 ,  H03M7/30 ,  H03M7/40 ,  H04N19/124

Abstract: Certain embodiments enable improved encoding and decoding of a vector of coefficients by associating a vector element of a signed pyramid with an encoded value that includes a first portion and a second portion, where the first portion identifies a corresponding vector element of an unsigned pyramid and a second portion characterizes sign values for nonzero components of the vector element of the signed pyramid. As a result, computational constraints such as word size apply to the unsigned pyramid instead of the signed pyramid. The smaller size of the unsigned pyramid enables extending the range of signed pyramid parameters that are operable within the computational constraints.

公开(公告)号：WO2018200384A1

公开(公告)日：2018-11-01

申请号：PCT/US2018/028877

申请日：2018-04-23

Applicant: DTS, INC.

Inventor： SEROUSSI, Gadiel ,  CHUBAREV, Pavel ,  SMITH, Brandon

IPC: H04B1/66 ,  H04B1/40 ,  G10L19/02 ,  H04N19/60 ,  H04N19/625 ,  H04N19/12

Abstract: An audio encoder can parse a digital audio signal into a plurality of frames, each frame including a specified number of audio samples, perform a transform of the audio samples of each frame to produce a plurality of frequency-domain coefficients for each frame, partition the plurality of frequency-domain coefficients for each frame into a plurality of bands for each frame, each band having bit data that represents a number of bits allocated for the band, and encode the digital audio signal and difference data to a bit stream (e.g., an encoded digital audio signal). The difference data can produce the full bit data when combined with estimate data that can be computed from data present in the bit stream. The difference data can be compressed to a smaller size than the full bit data, which can reduce the space required in the bit stream.

公开(公告)号：WO2015142524A1

公开(公告)日：2015-09-24

申请号：PCT/US2015/018804

申请日：2015-03-04

Applicant: DTS, INC.

Inventor： KALKER, Antonius ,  SEROUSSI, Gadiel

IPC: G10L19/00

CPC classification number: G10L19/008 ,  G10L19/20

Abstract: Lossy compression and transmission of a downmixed composite signal having multiple tracks and objects, including a downmixed signal, is accomplished in a manner that reduces the bit-rate requirement as compared to redundant transmission or lossless compression, while reducing upmix artifacts. A compressed residual signal is generated and transmitted along with a compressed total mix and at least one compressed audio objects. In the reception and upmix aspect the invention decompresses a downmixed signal and other compressed objects, calculates an approximate upmix signal, and corrects specific base signals derived from the upmix, by subtracting a decompressed residual signal. The invention thus allows lossy compression to be used in combination with downmixed audio signals for transmission through a communication channel (or for storage). Upon later reception and upmix, additional base signals are recoverable in capable systems providing multi-object capability (while legacy systems can easily decode a total mix without upmix).

Abstract translation: 具有多个轨道和物体（包括下混合信号）的下混复合信号的有损压缩和传输以与冗余传输或无损压缩相比降低比特率要求同时减少混合伪像的方式来实现。 压缩的残留信号被产生并与压缩的总混合和至少一个压缩音频对象一起传输。 在接收和上混方面，本发明解压缩下混合信号和其它压缩对象，通过减去解压缩残差信号来计算近似上混信号，并校正从上混合得到的特定基信号。 因此，本发明允许有损压缩与下混合音频信号组合使用以通过通信信道（或用于存储）进行传输。 在稍后的接收和上混合之后，可以在提供多对象能力的能力系统中恢复额外的基本信号（而传统的系统可以容易地解码没有混音的总混合）。