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公开(公告)号：US11545165B2
公开(公告)日：2023-01-03
申请号：US17256899
申请日：2019-07-02
Inventor： Srikanth Nagisetty , Hiroyuki Ehara , Rohith Mars , Chong Soon Lim , Toshiaki Sakurai
IPC: G10L19/04 , G10L19/008 , G10L19/02
Abstract: This encoding device is able to encode an S signal efficiently in MS prediction encoding. An M signal encoding unit generates first encoding information by encoding a sum signal indicating a sum of a left channel signal and a right channel signal that constitute a stereo signal. An energy difference calculation unit calculates a prediction parameter for predicting a difference signal indicating a difference between the left channel signal and the right channel signal by using a parameter regarding an energy difference between the left channel signal and the right channel signal. An entropy encoding unit generates second encoding information by encoding the prediction parameter.
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公开(公告)号：US11488573B2
公开(公告)日：2022-11-01
申请号：US17257413
申请日：2019-09-06
Inventor： Rohith Mars , Srikanth Nagisetty , Chong Soon Lim , Hiroyuki Ehara , Akihisa Kawamura
Abstract: In the acoustic object extraction device, beam forming processing units generate a first acoustic signal by beam forming in an arrival direction of a signal from an acoustic object with respect to a microphone array and generate a second acoustic signal by beam forming in an arrival direction of a signal from the acoustic object with respect to a microphone array, and a common component extraction unit extracts, on the basis of a similarity between the spectrum of the first acoustic signal and the spectrum of the second acoustic signal and from the first acoustic signal and the second acoustic signal, a signal containing a common component corresponding to the acoustic object. The common component extraction unit divides the spectrums of the first acoustic signal and the second acoustic signal into a plurality of frequency sections and calculates a similarity for each of the frequency sections.
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3.发明授权公开(公告)号：US11994605B2
公开(公告)日：2024-05-28
申请号：US17600513
申请日：2020-03-16
Inventor： Rohith Mars , Srikanth Nagisetty , Chong Soon Lim , Hiroyuki Ehara , Akihisa Kawamura
CPC classification number: G01S3/8027 , G01S3/8083 , H04R1/406
Abstract: Provided is a direction of arrival estimation device wherein: a calculation circuit calculates a frequency weighting factor for each of a plurality of frequency components of signals recorded in a microphone array, on the basis of the differences among unit vectors indicating the directions of the sound sources of each of the plurality of frequency components; and an estimation circuit estimates the direction of arrival of a signal from the sound source, on the basis of the frequency weighting factors.
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公开(公告)号：US11909998B2
公开(公告)日：2024-02-20
申请号：US16906993
申请日：2020-06-19
Inventor： Che-Wei Kuo , JIng Ya Li , Chong Soon Lim , Han Boon Teo , Hai Wei Sun , Rohith Mars , Tadamasa Toma , Takahiro Nishi , Kiyofumi Abe , Yusuke Kato
IPC: H04N19/50 , H04N19/124 , H04N19/176 , H04N19/186 , H04N19/96
CPC classification number: H04N19/50 , H04N19/124 , H04N19/176 , H04N19/186 , H04N19/96
Abstract: An encoder includes circuitry and memory. The circuitry determines whether a first virtual pipeline decoding unit (VPDU) is split into smaller blocks and whether a second VPDU is split into smaller blocks. In response to a determination the first VPDU is not split into smaller blocks and a determination the second VPDU is split into smaller blocks, a block of chroma samples is predicted without using luma samples. In response to a determination the first VPDU is split into smaller blocks and a determination the second VPDU is split into smaller blocks, the block of chroma samples is predicted using luma samples. In response to a determination the first VPDU is not split into smaller blocks and a determination the second VPDU is not split into smaller block, the block of chroma samples is predicted using luma samples. The block is encoded using the predicted chroma samples.
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