# US 2019/0174445 A1 · Wireless apparatus, processing method for a wireless apparatus, and program > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0174445 A1 - Document ID: US20190174445A1 - Status: Published application - Kind: A1 - Application number: 16/313,902 - Filed: 2017-09-13 - Published: 2019-06-06 - Earliest claimed: 2016-09-23 - Assignees: Sony Corporation - Applicants: Sony Corporation - Inventors: Takeshi ITAGAKI; Junji KATO; Hideyuki SUZUKI - Web page: https://patentgrep.com/patent/US20190174445A1 ## CPC - H04W 56/0015: {one node acting as a reference for the others} - H04J 3/0667: {Bidirectional timestamps, e.g. NTP or PTP for compensation of clock drift and for compensation of propagation delays (arrangements for monitoring round trip delays in packet switching networks H04L43/0864)} - H04N 21/4305: {Synchronising client clock from received content stream, e.g. locking decoder clock with encoder clock, extraction of the PCR packets (arrangements for synchronising receiver with transmitter by comparing receiver clock with transmitter clock H04L7/0012; arrangements for synchronising receiver with transmitter wherein the receiver takes measures against momentary loss of synchronisation H04L7/0083)} - H04N 21/43076: {of the same content streams on multiple devices, e.g. when family members are watching the same movie on different devices} - H04N 21/43079: {of additional data with content streams on multiple devices} - H04R 5/00: Stereophonic arrangements (stereophonic pick-ups H04R9/16, H04R11/12, H04R17/08, H04R19/10) - H04R 27/00: Public address systems (circuits for preventing acoustic reaction H04R3/02; circuits for distributing signals to loudspeakers H04R3/12; {monitoring or testing arrangements for public address systems H04R29/007}; amplifiers H03F) - H04R 2227/003: Digital PA systems using, e.g. LAN or internet - H04R 2420/07: Applications of wireless loudspeakers or wireless microphones - H04W 84/12: WLAN [Wireless Local Area Networks] - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04J: MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N7/08; in exchanges H04Q11/00; stereophonic systems H04S) - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - H04R: LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS (producing sounds with frequency not determined by supply frequency G10K) ## Abstract To precisely synchronize system clocks, medium clocks, or the like of apparatuses with each other. A wireless apparatus includes a main control unit and a wireless control unit. Information regarding a correspondence between a clock that manages a time of the main control unit and a clock that manages a time of the wireless control unit is wirelessly sent to another wireless apparatus by the wireless control unit. This information regarding the correspondence includes information regarding a difference between the two clocks, information regarding a granularity ratio of the two clocks, and the like. For example, the wireless control unit sends the information regarding the correspondence as a part of a frame for measuring the time of the wireless control unit with respect to the other wireless apparatus or a part of a frame for connecting to the other wireless apparatus. ## Claims ### Claim 1 A wireless apparatus, comprising: main control unit; and a wireless control unit that wirelessly sends information regarding a correspondence between a clock that manages a time of the main control unit and a clock that manages a time of the wireless control unit to another wireless apparatus, the information regarding the correspondence including information regarding a difference between the two clocks. ### Claim 2 (depends on 1) The wireless apparatus according to claim 1, wherein the information regarding the correspondence further includes information regarding a granularity radio of the two clocks. ### Claim 3 (depends on 1) The wireless apparatus according to claim 1, wherein the wireless control unit sends the information regarding the correspondence as a part of a frame for measuring the time of the wireless control unit with respect to the other wireless apparatus. ### Claim 4 (depends on 1) The wireless apparatus according to claim 1, wherein the wireless control unit sends the information regarding the correspondence as a part of a frame for connecting to the other wireless apparatus. ### Claim 5 (depends on 1) The wireless apparatus according to claim 1, further comprising an audio reproduction processing unit that wirelessly receives audio data from an external apparatus and drives a speaker by performing reproduction processing on a basis of the clock that manages the time of the main control unit. ### Claim 6 (depends on 1) The wireless apparatus according to claim 1, further comprising an audio reproduction processing unit that wirelessly sends audio data to an external apparatus and drives a speaker by performing reproduction processing on a basis of the clock that manages the time of the main control unit also by itself. ### Claim 7 A processing method for a wireless apparatus including a main control unit and a wireless control unit, comprising a step off by the wireless control unit, wirelessly sending information regarding a correspondence between a clock that manages a time of the main control unit and a clock that manages a time of the wireless control unit to another wireless apparatus, the information regarding the correspondence including information regarding a difference between the two clocks. ### Claim 8 A program that causes a computer that controls an operation of a wireless apparatus including a main control unit and a wireless control unit to execute a processing method comprising a step of, by the wireless control unit, wirelessly sending information regarding a correspondence between a clock that manages a time of the main control unit and a clock that manages a time of the wireless control unit to another wireless apparatus, the information regarding the correspondence including information regarding a difference between the two clocks. ### Claim 9 A wireless apparatus, comprising: a main control unit; a wireless control unit that receives, from another wireless apparatus, information regarding a correspondence between a clock that manages a time of a main control unit and a clock that manages a time of a wireless control unit in the other wireless apparatus, the information recording the correspondence including information regarding a difference between the two clocks; and a correction unit that corrects a clock that manages a time of the main control unit of its own apparatus by converting the clock that manages a time of the wireless control unit of its own apparatus into the clock that manages the time of the main control unit of its own apparatus on a basis of the information regarding the correspondence. ### Claim 10 (depends on 9) The wireless apparatus according to claim 9, wherein the information regarding the correspondence further includes information regarding a granularity ratio of the two clocks. ### Claim 11 (depends on 9) The wireless apparatus according to claim 9, further comprising an audio reproduction processing unit that wirelessly receives audio data from an external apparatus and drives a speaker by performing reproduction processing on a basis of the clock that manages the time of the main control unit. ### Claim 12 (depends on 9) The wireless apparatus according to claim 9, further comprising an audio reproduction processing unit that wirelessly sends audio data to an external apparatus and drives a speaker by performing reproduction processing on a basis of the clock that manages the time of the main control unit also by itself. ### Claim 13 A processing method for a wireless apparatus including a main control unit and a wireless control unit, comprising: a reception step of, by the wireless control unit, receiving, from another wireless apparatus, information regarding a correspondence between a clock that manages a time of a main control unit and a clock that manages a time of a wireless control unit in the other wireless apparatus; and a correction step of, by a correction unit, correcting a clock that manages a time of the main control unit of its own apparatus by converting a clock that manages a time of the wireless control unit of its own apparatus info the clock that manages the time of the main control unit of its own apparatus on a basis of the information regarding the correspondence, the information regarding the correspondence including information regarding a difference between the two clocks. ### Claim 14 A program that causes a computer that controls an operation of a wireless apparatus including a main control unit and a wireless control unit to execute a processing method comprising: a reception step of, by the wireless control unit, receiving, from another wireless apparatus, information regarding a correspondence between at clock that manages a time of a main control unit and a clock that manages a time of a wireless control unit in the other wireless apparatus; and a correction step of, by a correction unit, correcting a clock that manages a time of the main control unit of its own apparatus by converting a clock that a time of the wireless control unit of its own apparatus into the clock that manages the time of the main control unit of its own apparatus on a basis of the information regarding the correspondence, the information regarding the correspondence including information regarding a difference between the two clocks. ### Claim 15 A wireless apparatus, comprising: a medium processing unit; and a wireless control unit that wirelessly sends information regarding a correspondence between a clock that manages a time of the medium processing unit and a clock that manages a time of the wireless control unit to another wireless apparatus, the information regarding the correspondence including information regarding a difference between the two clocks. ### Claim 16 (depends on 15) The wireless apparatus according to claim 15, wherein the medium processing unit wirelessly receives audio data from an external apparatus and drives a speaker by performing reproduction processing on a basis of the clock that manages the time of the medium processing unit. ### Claim 16 A wireless apparatus, comprising: a medium processing unit; a wireless control unit that receives, from another wireless apparatus, information regarding a correspondence between a clock that manages a time of the medium processing unit and a clock that managers a time of the wireless control unit in the other wireless apparatus, the information regarding the correspondence including in formation regarding a difference between the two clocks; and a correction unit that corrects a clock that manages a time of the medium processing unit of its own apparatus by converting a clock that manages a time of the wireless control unit of its own apparatus into the clock that manages the time of the medium processing unit of its own apparatus on a basis of the information regarding the correspondence. ### Claim 17 (depends on 15) The wireless apparatus according to claim 15, the medium processing unit wirelessly sends audio data to an external apparatus and drives a speaker by performing reproduction processing on a basis of the clock that manages the time of the medium processing unit by itself. ### Claim 19 (depends on 18) The wireless apparatus according to claim 18, wherein the medium processing unit wirelessly receives audio data from an external apparatus and drives a speaker by performing reproduction processing on a basis of the clock that manages the time of the medium processing unit. ### Claim 20 (depends on 18) The wireless apparatus according to claim 18, wherein the medium processing unit wirelessly sends audio data to an external apparatus and drives a speaker by performing reproduction processing on a basis of the clock that manages the time of the medium processing unit also by itself.