公开(公告)号：US20240276018A1

公开(公告)日：2024-08-15

申请号：US18643085

申请日：2024-04-23

申请人： GOOGLE LLC

发明人： Jyrki Alakuijala ,  Robert Obryk ,  Evgenii Kliuchnikov ,  Zoltan Szabadka ,  Jan Wassenberg ,  Minttu Alakuijala ,  Lode Vandevenne

IPC分类号： H04N19/65 ,  H04N19/124 ,  H04N19/18 ,  H04N19/184 ,  H04N19/85

CPC分类号： H04N19/65 ,  H04N19/124 ,  H04N19/18 ,  H04N19/184 ,  H04N19/85

摘要： The loss of image quality during compression is controlled using a sequence of quality control metrics. The sequence of quality control metrics is selected for quantizing transform coefficients within an area of the image based on an error level definition. Candidate bit costs are then determined by quantizing the transform coefficients according to the error level definition or a modified error level and the sequence of quality control metrics. Where the candidate bit cost resulting from using the modified error level is lower than the candidate bit cost resulting from using the error level definition, the transform coefficients are quantized according to the modified error level and the sequence of quality control metrics. Otherwise, the transform coefficients are quantized based on the error level definition and according to the sequence of quality control metrics.

公开(公告)号：US20240105190A1

公开(公告)日：2024-03-28

申请号：US18472841

申请日：2023-09-22

申请人： GOOGLE LLC

发明人： Martin Bruse ,  Jyrki Antero Alakuijala ,  Moritz Firsching ,  Thomas Fischbacher ,  Sami Boukortt ,  Evgenii Kliuchnikov

IPC分类号： G10L19/022

CPC分类号： G10L19/022

摘要： A method including receiving an audio signal, generating a transformed audio signal by transforming the audio signal using a plurality of windows each separated in time, generating an interpolated audio signal by interpolating the transformed audio signal, generating a separated audio signal by applying a mask to the interpolated audio signal, and compressing the separated audio signal.

公开(公告)号：US11463733B2

公开(公告)日：2022-10-04

申请号：US16970499

申请日：2019-02-15

申请人： Google LLC

发明人： Jyrki Alakuijala ,  Robert Obryk ,  Evgenii Kliuchnikov ,  Zoltan Szabadka ,  Jan Wassenberg ,  Minttu Alakuijala ,  Lode Vandevenne

IPC分类号： H04N19/65 ,  H04N19/124 ,  H04N19/18 ,  H04N19/184 ,  H04N19/85

摘要： The loss of image quality during compression is controlled using a sequence of quality control metrics. The sequence of quality control metrics is selected for quantizing transform coefficients within an area of the image based on an error level definition. Candidate bit costs are then determined by quantizing the transform coefficients according to the error level definition or a modified error level and the sequence of quality control metrics. Where the candidate bit cost resulting from using the modified error level is lower than the candidate bit cost resulting from using the error level definition, the transform coefficients are quantized according to the modified error level and the sequence of quality control metrics. Otherwise, the transform coefficients are quantized based on the error level definition and according to the sequence of quality control metrics.

公开(公告)号：US20240205603A1

公开(公告)日：2024-06-20

申请号：US18538452

申请日：2023-12-13

申请人： Google LLC

发明人： Jyrki Antero Alakuijala ,  Matthew Sharifi ,  Martin Bruse ,  Zoltan Szabadka ,  Thomas Fischbacher ,  Sami Boukortt ,  Moritz Firsching ,  Evgenii Kliuchnikov

IPC分类号： H04R3/12 ,  H03F3/217 ,  H04R1/40

CPC分类号： H04R3/12 ,  H03F3/2171 ,  H04R1/403 ,  H03F2200/03 ,  H03F2200/351 ,  H04R2201/401 ,  H04R2201/403 ,  H04R2430/20

摘要： Spatial audio may be generated by a speaker array that is switched according to rows and/or columns to reduce its cost and complexity. The speaker array may include a row of speakers that are each coupled to a different column channel. The rows of speakers can receive portions of the spatial audio on a row-by-row basis as each row is activated to couple the speakers in a row to their respective column. This switched approach reduces a number of required audio sources. The audio sources may generate PWM signals for each column using an approach that is similar to that found in Class-D amplification or sigma-delta Modulation. Analog signals may be recovered from the PWM signals using a low-pass filter positioned before each speaker in the array.

公开(公告)号：US20230016253A1

公开(公告)日：2023-01-19

申请号：US17955788

申请日：2022-09-29

申请人： GOOGLE LLC

发明人： Jyrki Alakuijala ,  Robert Obryk ,  Evgenii Kliuchnikov ,  Zoltan Szabadka ,  Jan Wassenberg ,  Minttu Alakuijala ,  Lode Vandevenne

IPC分类号： H04N19/65 ,  H04N19/124 ,  H04N19/18 ,  H04N19/184 ,  H04N19/85

摘要： The loss of image quality during compression is controlled using a sequence of quality control metrics. The sequence of quality control metrics is selected for quantizing transform coefficients within an area of the image based on an error level definition. Candidate bit costs are then determined by quantizing the transform coefficients according to the error level definition or a modified error level and the sequence of quality control metrics. Where the candidate bit cost resulting from using the modified error level is lower than the candidate bit cost resulting from using the error level definition, the transform coefficients are quantized according to the modified error level and the sequence of quality control metrics. Otherwise, the transform coefficients are quantized based on the error level definition and according to the sequence of quality control metrics.

公开(公告)号：US20210084339A1

公开(公告)日：2021-03-18

申请号：US16970499

申请日：2019-02-15

申请人： Google LLC

发明人： Jyrki Alakuijala ,  Robert Obryk ,  Evgenii Kliuchnikov ,  Zoltan Szabadka ,  Jan Wassenberg ,  Minttu Alakuijala ,  Lode Vandevenne

IPC分类号： H04N19/65 ,  H04N19/124 ,  H04N19/18 ,  H04N19/184 ,  H04N19/85

摘要： The loss of image quality during compression is controlled using a sequence of quality control metrics. The sequence of quality control metrics is selected for quantizing transform coefficients within an area of the image based on an error level definition. Candidate bit costs are then determined by quantizing the transform coefficients according to the error level definition or a modified error level and the sequence of quality control metrics. Where the candidate bit cost resulting from using the modified error level is lower than the candidate bit cost resulting from using the error level definition, the transform coefficients are quantized according to the modified error level and the sequence of quality control metrics. Otherwise, the transform coefficients are quantized based on the error level definition and according to the sequence of quality control metrics.