# US 11,115,694 B2 · Information processing apparatus, method, and program

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- Number: US 11,115,694 B2
- Document ID: US11115694B2
- Status: Granted
- Kind: B2
- Application number: 16/656,487
- Filed: 2019-10-17
- Published: 2020-02-13
- Granted: 2021-09-07
- Earliest claimed: 2013-10-21
- Assignees: Sony Corporation
- Applicants: Sony Corporation
- Inventors: Akira Inoue; Shusuke Takahashi; Masayuki Nishiguchi
- Web page: https://patentgrep.com/patent/US11115694B2

## CPC

- H04N 21/242: Synchronisation processes, e.g. processing of PCR [Programme Clock References] {(arrangements for synchronising broadcast or distribution via plural systems in broadcast distribution systems H04H20/18)}
- G11B 27/10: Indexing; Addressing; Timing or synchronising; Measuring tape travel
- H04N 5/04: Synchronising (for television systems using pulse code modulation H04N7/56)
- H04N 5/60: for the sound signals
- H04N 21/23602: {Multiplexing isochronously with the video sync, e.g. according to bit-parallel or bit-serial interface formats, as SDI}
- H04N 21/4122: {additional display device, e.g. video projector (digital output for controlling a plurality of local displays G06F3/1423)}
- H04N 21/4342: {Demultiplexing isochronously with video sync, e.g. according to bit-parallel or bit-serial interface formats, as SDI}
- H04N 21/4394: {involving operations for analysing the audio stream, e.g. detecting features or characteristics in audio streams (arrangements characterised by components specially adapted for monitoring, identification or recognition of audio in broadcast systems H04H60/58)}
- H04N 21/8547: involving timestamps for synchronizing content
- G11B 27/28: by using information signals recorded by the same method as the main recording {(G11B27/22 takes precedence)}
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION
- G11B: INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G01D9/00; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards G06K; transferring data from one type of record carrier to another G06K1/18; circuits for coupling output of reproducer to radio receiver H04B1/20; gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor H04R)

## Abstract

An information processing apparatus for reproducing second content in synchronization with reproduction of first content by a second information processing apparatus different from the information processing apparatus, the first content comprising audio content. The information processing apparatus comprising circuitry configured to: extract a first feature from the audio content; obtain a second feature of the audio content, the second feature being together with the second content; compare the first feature with the second feature; and generate, based on results of the comparing, synchronization information used for reproducing the second content in synchronization with the first content.

## Claims

### Claim 1

A signal processing apparatus, comprising:
a frequency band dividing unit configured to divide a sound signal included in a first content into a plurality of frequency bands;
a periodicity detection unit configured to detect periodicity information of each frequency band supplied from the frequency band dividing unit;
a periodicity information merging unit configured to merge the periodicity information detected by the periodicity detection unit;
a peak detection unit configured to generate peak information by detecting a peak position of the merged periodicity information;
a downsampling unit configured to downsample the peak information for a plurality of time sections to a downsampled peak information for a time section; and
an output unit configured to output the downsampled peak information as a synchronization feature amount for synchronizing a second content with the first content.

### Claim 2

A method, comprising:
dividing a sound signal included in a first content into a plurality of frequency bands;
detecting periodicity information of each frequency band of the plurality of frequency bands;
merging the detected periodicity information;
generating peak information by detecting a peak position of the merged periodicity information;
downsampling the peak information for a plurality of time sections to a downsampled peak information for a time section; and
outputting the downsampled peak information as a synchronization feature amount for synchronizing a second content with the first content.

### Claim 3

At least one non-transitory computer readable storage medium storing processor-executable instructions that, when executed by at least one computer, cause the at least one computer to perform a method, comprising:
dividing a sound signal included in a first content into a plurality of frequency bands;
detecting periodicity information of each frequency band of the plurality of frequency bands;
merging the detected periodicity information;
generating peak information by detecting a peak position of the merged periodicity information;
downsampling the peak information for a plurality of time sections to a downsampled peak information for a time section; and
outputting the downsampled peak information as a synchronization feature amount for synchronizing a second content with the first content.