公开(公告)号：US20180316923A1

公开(公告)日：2018-11-01

申请号：US15963747

申请日：2018-04-26

申请人： DTS, Inc.

发明人： Jacek Stachurski ,  Zoran Fejzo

IPC分类号： H04N19/152 ,  G10L19/002 ,  H04L29/06

摘要： Systems and methods are described for processing data from a sequential series of groups of frames to achieve a target average processing bit rate for a particular group of frames in the series. In an example, a look-ahead buffer circuit can be populated with a number of frames from a particular group of frames, and a bit allocation can be determined for a frame in the look-ahead buffer circuit using bit request information about all of the frames in the buffer. The look-ahead buffer circuit can be populated with streaming frame information in a first-in-first-out manner, and bit allocation processing can be performed for each frame, in a particular group of frames, based on a frame position in the look-ahead buffer circuit and further based on bit requests associated with other frames in the look-ahead buffer circuit.

公开(公告)号：US20180075855A1

公开(公告)日：2018-03-15

申请号：US15700059

申请日：2017-09-08

申请人： DTS, Inc.

发明人： Elias Nemer ,  Jacek Stachurski ,  Zoran Fejzo ,  Antonius Kalker

IPC分类号： G10L19/09 ,  G10L19/032 ,  G10L19/02 ,  G10L19/26 ,  G10L25/21

CPC分类号： G10L19/09 ,  G10L19/0212 ,  G10L19/032 ,  G10L19/26 ,  G10L25/21

摘要： A frequency domain long-term prediction system and method for estimating and applying an optimum long term predictor. Embodiments of the system and method include determining parameters of a single-tap predictor using a frequency-domain analysis having an optimality criteria based on spectral flatness measure. Embodiments of the system and method also include determining parameters of the long-term predictor by accounting for the performance of the vector quantizer in quantizing the various subbands. In some embodiments other encoder metrics (such as signal tonality) are used as well. Other embodiments of the system and method include determining the optimal parameters of the long-term predictor by accounting for some of the decoder operation. Other embodiments of the system and method include extending a 1-tap predictor to a k-th order predictor by convolving the 1-tap predictor with a pre-set filter and selecting from a table of such pre-set filters based on a minimum energy criteria.

公开(公告)号：US11380340B2

公开(公告)日：2022-07-05

申请号：US15700059

申请日：2017-09-08

申请人： DTS, Inc.

发明人： Elias Nemer ,  Jacek Stachurski ,  Zoran Fejzo ,  Antonius Kalker

IPC分类号： G10L19/09 ,  G10L19/02 ,  G10L19/032 ,  G10L19/26 ,  G10L25/21

摘要： A frequency domain long-term prediction system and method for estimating and applying an optimum long term predictor. Embodiments of the system and method include determining parameters of a single-tap predictor using a frequency-domain analysis having an optimality criteria based on spectral flatness measure. Embodiments of the system and method also include determining parameters of the long-term predictor by accounting for the performance of the vector quantizer in quantizing the various subbands. In some embodiments other encoder metrics (such as signal tonality) are used as well. Other embodiments of the system and method include determining the optimal parameters of the long-term predictor by accounting for some of the decoder operation. Other embodiments of the system and method include extending a 1-tap predictor to a k-th order predictor by convolving the 1-tap predictor with a pre-set filter and selecting from a table of such pre-set filters based on a minimum energy criteria.