# US 2007/0136769 A1 · Apparatus for playing of synchronized video between wireless devices > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2007/0136769 A1 - Document ID: US20070136769A1 - Status: Published application - Kind: A1 - Application number: 11/566,580 - Filed: 2006-12-04 - Published: 2007-06-14 - Earliest claimed: 2002-05-06 - Assignees: SyncroNation, Inc. - Inventors: David Goldberg; Jim Sears - Web page: https://patentgrep.com/patent/US20070136769A1 ## CPC - G10H 1/0083: {using wireless transmission, e.g. radio, light, infrared} - G10H 1/0025: {Automatic or semi-automatic music composition, e.g. producing random music, applying rules from music theory or modifying a musical piece (automatically producing a series of tones G10H1/26)} - G10H 1/40: Rhythm - G10H 2210/076: for extraction of timing, tempo; Beat detection - G10H 2240/175: for jam sessions or musical collaboration through a network, e.g. for composition, ensemble playing or repeating; Compensation of network or internet delays therefor - G10H 2240/251: Mobile telephone transmission, i.e. transmitting, accessing or controlling music data wirelessly via a wireless or mobile telephone receiver, analogue or digital, e.g. DECT, GSM, UMTS - G10H 2240/305: Internet or TCP/IP protocol use for any electrophonic musical instrument data or musical parameter transmission purposes - G10H 2240/325: Synchronizing two or more audio tracks or files according to musical features or musical timings - H04H 60/58: of audio {(determination or detection of speech characteristics in general G10L25/00; speech recognition in general G10L15/00)} - H04R 1/1016: {Earpieces of the intra-aural type} - H04R 2420/07: Applications of wireless loudspeakers or wireless microphones - G10H: ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE - H04H: BROADCAST COMMUNICATION (multiplex communication H04J; pictorial communication aspects of broadcast systems H04N) - 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 A method and apparatus is disclosed for the shared playing of video by a first video player and a second video player. More particularly, the invention relates to a method for playing a video signal on a first portable video player synchronously with the same video signal on a second portable video player. In one aspect, the first portable video player is enabled to transmit video to a second player. The video is played synchronously on both video players, wherein the video is received from another player or from storage on the player. In various further aspects, synchronization signals are used to adjust the position of the video signal playing on the first and second video player, where the video signal is present on both video players. ## Claims ### Claim 1 A method for the shared playing of video by a first video player and a second video player, comprising: playing the video signals on the first video player while transmitting synchronization signals from the first video player to the second video player; and receiving the synchronization signals by the second video player, wherein the synchronization signals allow the video signals on the second video player to be played on the second video player essentially simultaneously with the playing of the video signals on the first video player; wherein the first video player and the second video player are mobile. ### Claim 2 (depends on 1) The method of claim 1, wherein the synchronization signal adjusts the position of the video signal playing on the second video player. ### Claim 3 (depends on 1) The method of claim 1, wherein the synchronization signal is transmitted wirelessly. ### Claim 4 (depends on 3) The method of claim 3, wherein the synchronization signal is transmitted by a link layer involving a protocol selected from the group consisting of 802.11, Bluetooth, ultrawideband, HiperLAN and WDCT. ### Claim 5 (depends on 1) The method of claim 1, wherein a file with the video signal is present on the first video player and a file with the video signal is present on the second video player. ### Claim 6 (depends on 1) The method of claim 1, further comprising transferring a file comprising the video signals from the first video player device to the second video player. ### Claim 7 (depends on 6) The method of claim 6, wherein the transmitting is coincident with transferring. ### Claim 8 (depends on 1) The method of claim 1, further comprising delaying the playing of the video signal on the second video player. ### Claim 9 A method for playing a video signal on a first portable video player synchronously with the same video signal on a second portable video player, comprising: transmitting the video signal from the first video player; receiving the video signal on the second video player on an input port; playing the video signal on a video output of the second video player; transferring the video signal to the video output of the first video player; providing a delay between the input port and the video output of the second video player; and delaying the video signal on the video output of the first video player by a second predetermined delay; wherein the video signal is played synchronously at the video output of the first video player and the video output of the second video player. ### Claim 10 (depends on 9) The method of claim 9, wherein the transmitting is wireless. ### Claim 11 (depends on 9) The method of claim 9, wherein the transmitting uses a link layer involving a protocol selected from the group consisting of 802.11, Bluetooth, ultrawideband, HiperLAN and WDCT. ### Claim 12 (depends on 9) The method of claim 9, wherein the transmitting uses a wired connection. ### Claim 13 A method for playing a video signal that is present on a first mobile video player synchronously with the same video signal on a second mobile video player, comprising: establishing whether the video signal is present on the second video player; sending a synchronization signal from the first video player to the second video player; and playing the audio signal synchronously on the first video player and the second video player. ### Claim 14 (depends on 13) The method of claim 13, wherein establishing and sending use wireless communication. ### Claim 15 (depends on 13) The method of claim 13, wherein the synchronization signal adjusts the position of the video signal playing on the second like video player. ### Claim 16 (depends on 13) The method of claim 13, further comprising delaying the playing of the video signal on the second player. ### Claim 17 A first mobile video player that can play a video signal with a second mobile video player, comprising: media for storing the video signal; video output for playing the video signal from the media; an input video port for receiving a video signal from an output video port of the second video player; and a transmitter for transmitting a synchronization signal to the second video player, wherein the synchronization signal allows the video signal in the player to be played synchronously with same video signal stored in the media of the second video player. ### Claim 18 (depends on 17) The player of claim 17, wherein the input video port receives the video signal wirelessly. ### Claim 19 (depends on 17) The player of claim 17, wherein the input video port receives the video signal using a wire connection. ### Claim 20 (depends on 17) The player of claim 17, wherein the synchronization signal adjusts the position of the video signal playing on the like video player. ### Claim 21 (depends on 17) The player of claim 17, wherein the synchronization signals comprise the current sample number being played on the video player. ### Claim 22 (depends on 17) The player of claim 17, further comprising a delay that delays the playing of the video on the second video player. ### Claim 23 (depends on 17) The player of claim 17, wherein the media is selected from the group consisting of digital video disk, hard disk drive, removable disks and flash memory. ### Claim 24 A method for playing a video signal on a portable video player synchronously with playing the same video signal on a second portable video player, comprising: storing the video signal on the video player; playing the stored video signal; transmitting a synchronization signal from the video player to the second video player; playing the video signal on the second video player so that the part of the video signal that is playing on the second video player is substantially the same as the part of the video signal that is playing on the video player; wherein the video signal is played synchronously on the video player and the second video player. ### Claim 25 (depends on 24) The method of claim 24, wherein the synchronization signal comprises a position indicator of the video signal that is playing on the video player. ### Claim 26 (depends on 24) The method of claim 24, further comprising transferring the video signal to the second video player. ### Claim 27 (depends on 26) The method of claim 26, wherein the transferring comprises streaming. ### Claim 28 (depends on 27) The method of claim 27, wherein the transferring comprises file transfer.