JP5002354B2 - Recording / playback system, recording / playback method, and recorder - Google Patents

Description

  The present invention relates to a recorder, and more particularly to a technique for performing a chasing playback function for playing back a recorded scene before a scene currently being broadcast while recording a program being broadcast via a network.

  Recorders such as a hard disk recorder, a DVD recorder, and a television with a recording function have a function of recording and reproducing a broadcast program. Some recorders have a chasing playback function. The chasing playback function is a function for playing back a previously recorded scene while recording a currently broadcast program. With this function, even if the viewer interrupts viewing while the program is being broadcast, the viewer can resume viewing the program from the interrupted scene while recording the currently broadcast scene. You can watch without missing.

  Furthermore, according to Patent Document 1, when a recorded program is played back faster than the original playback speed and catches up with a broadcast scene, it is possible to switch to a broadcast video.

JP 2001-216731 A

  However, in the above-described conventional technology, the chasing playback of the video recorded by the recorder can be performed only by the recorder that recorded the video. For this reason, the user needs to continue to use the recorder in order to view the chasing playback video, and is restricted from moving from the installation location of the recorder. For example, it was not possible to continue chasing playback that had been done with a living room recorder with a bedroom recorder.

  The purpose of the present invention is to increase the convenience of the user if the continuation of the chasing playback that has been performed with the recorder in the living room can be performed with a recorder in a separate room, and the continuation of the chasing playback that is performed with the remote recorder, A recording / playback system, a recording / playback method, and a recorder that can be performed by a local recorder connected to a network.

  In order to achieve the above object, a recording / playback system of the present invention includes a tuner that receives broadcast waves and outputs a video signal of a program, a recording unit that records a video signal of a program output by the tuner, and the recording Remote recorder including a transmission unit that transmits a video signal of a program recorded by the unit to a local recorder, a tuner that receives a broadcast wave and outputs the video signal of the program, and a recording that records the video signal of the program output by the tuner A receiver that receives a video signal of a previous scene of the program from a remote recorder, a video signal output by the tuner, a video signal recorded by the recording unit, and a playback that reproduces a video signal received by the receiver And a local recorder having a unit.

  In addition, the recording / playback method of the present invention receives the video signal of the program recorded by the local recorder from the local recorder, plays the video signal at a higher speed than the original playback speed, and receives it with the tuner of the local recorder itself. The video signal of the program is recorded in a storage which is an internal storage unit.

  In addition, the reception and playback of the video signal of the program recorded by the local recorder of the recording / playback method of the present invention is received by its own tuner, and when the scene recorded in the storage is performed, the video signal of the program recorded by the local recorder is recorded. Stop receiving and playing, and start playing the video signal of the scene received by the tuner and recorded in the storage.

  In addition, when the video signal of the program recorded by the local recorder in the recording / playback method of the present invention is received up to the scene received by its own tuner, the video signal of the program recorded by the local recorder is received and played back. Is stopped, and playback of the video signal of the scene received by the tuner is started.

  Furthermore, the remote recorder of the present invention is configured to include a recording unit that records a video signal of a program and a transmission unit that transmits the video signal of the program recorded by the recording unit to a local recorder.

  The transmission unit of the remote recorder of the present invention transmits a video signal of a scene before the scene currently recorded by the recording unit.

  In addition, the transmission unit of the remote recorder of the present invention transmits the video signal of the scene at the time requested from the local recorder.

  The recording unit of the remote recorder of the present invention stops recording the video signal of the program when the transmitting unit transmits the video signal of the program recorded by the recording unit to the local recorder.

  The transmission unit of the remote recorder of the present invention stops transmitting the video signal of the program when the local recorder transmits the video signal of the program to the local recorder until the scene at the time when the local recorder starts recording the program.

  Further, the transmission unit of the remote recorder of the present invention turns off the power of the remote recorder when the video signal of the program is transmitted to the local recorder until the scene at which the local recorder starts recording the program.

  Furthermore, the local recorder of the present invention includes a tuner that receives broadcast waves and outputs a video signal of a program, a recording unit that records the video signal of the program output by the tuner, and a video signal of a scene before the program. Are received from a remote recorder, a video signal output from the tuner, a video signal recorded by the recording unit, and a unit for reproducing the video signal received by the reception unit.

  The receiving unit of the local recorder according to the present invention receives a video signal of a scene from a remote recorder by designating an arbitrary time.

  The receiving unit of the local recorder of the present invention stops receiving the video signal of the program when receiving the video signal of the program from the remote recorder until the scene at which the recording unit starts recording the program.

  In addition, when the reception unit of the local recorder of the present invention stops the reception of the video signal from the remote recorder, the reception unit notifies the remote recorder of the stop of the reception of the video signal of the program.

Furthermore, the transmission unit of the remote recorder of the present invention turns off the power of the remote recorder when it detects that all the local recorders transmitting the video signal have stopped receiving the video signal of the program.
Further, the transmission unit of the remote recorder of the present invention turns off the power of the remote recorder upon receiving notification of stopping the reception of the video signal of the program from all the local recorders transmitting the video signal.

  According to the present invention, a video signal recorded from a remote recorder connected to a network can be received and chased and reproduced by a local recorder.

  Furthermore, if the video signal recorded by the remote recorder connected to the network is chased and reproduced, the video signal is recorded by the local recorder, and the video signal recorded by the remote recorder is chased and reproduced until the broadcast time of the video signal already recorded by the local recorder. The chasing playback can be continued with the video signal recorded by the local recorder, and the reception of the video signal from the remote recorder can be stopped.

  Further, when the reception of the video signal from the remote recorder is stopped, the power of the remote recorder can be turned off.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 shows a system configuration diagram of the recording / playback system of the first embodiment. The functional configurations and functions of the local recorder 100 and the remote recorder 110 will be described with reference to FIG.

== Local recorder 100 ==
The local recorder 100 is a recorder constituting a recording / playback system. The local recorder 100 includes a network interface card (NIC) 101, a tuner 102, a transfer control unit 103, a recording control unit 104, a storage 105, a playback control unit 106, and a video output unit 107. . The tuner 102 is connected to the antenna 120. The NIC 101 is connected to the network 140 and constitutes a transmission / reception unit. The video output unit 107 is connected to the display device 130. It should be noted that the transmission / reception unit is used as a general term for only a transmission function, only a reception function, or all having a transmission / reception function. In FIG. 1, the display device 130 is illustrated as an external device of the recorder, but it goes without saying that the recorder itself may include a display unit.

  The NIC 101 is connected to the network 140, receives the video signal 150 from the remote recorder 110, and outputs the video signal 150 to the transfer control unit 103. Therefore, the NIC 101 functions as a transmission / reception unit that receives the video signal 150.

  The tuner 102 receives the video signal 150 from the broadcast wave via the antenna 120 and outputs the received video signal 150 to the recording control unit 104 or the playback control unit 106.

  The transfer control unit 103 receives the video signal 150 from the NIC 101 and outputs the video signal 150 to the reproduction control unit 106 or the storage 105.

  The recording control unit 104 receives the video signal 150 from the tuner 102 and outputs the video signal 150 to the storage 105.

  The storage 105 serving as a storage unit receives and records the video signal 150 from the transfer control unit 103 or the recording control unit 104, and outputs the recorded video signal 150 to the reproduction control unit 106.

  The reproduction control unit 106 receives the video signal 150 from the transfer control unit 103, the storage 105, or the tuner 102, and outputs the video signal 150 to the video output unit 107.

  The video output unit 107 receives the video signal 150 from the reproduction control unit 106 and outputs the video signal 150 to the display device 130.

== External device ==
The display device 130 displays the video signal 150 output from the local recorder 100.

  The antenna 120 receives a broadcast wave and inputs it to the tuner 102. The network 140 connects the local recorder 100 and the remote recorder 110 and transmits the video signal 150 transmitted by the remote recorder 110 to the local recorder 100. The tuner 102 and the antenna 120 may be configured as an external device for the recorder.

== Remote recorder 110 ==
The remote recorder 110 includes a tuner 102, a recording control unit 104, a storage 105, a transfer control unit 103, a NIC 101, and a power supply control unit 108. The tuner 102 is connected to the antenna 120. The NIC 101 is connected to the network 140 and constitutes a transmission / reception unit.

  The tuner 102 receives the video signal 150 from the broadcast wave via the antenna 120, and outputs the received video signal 150 to the recording control unit 104 or the transfer control unit 103.

  The recording control unit 104 receives the video signal 150 from the tuner 102 and outputs the video signal 150 to the storage 105.

  The storage 105 serving as a storage unit receives and records the video signal 150 from the recording control unit 104, and outputs the recorded video signal 150 to the transfer control unit 103.

  The transfer control unit 103 receives the video signal 150 from the tuner 102 or the storage 105 and outputs the video signal 150 to the NIC 101.

  The NIC 101 is connected to the network 140, receives the video signal 150 from the transfer control unit 103, and transmits the video signal 150 to the local recorder 100. Therefore, the NIC 101 functions as a transmission / reception unit that transmits the video signal 150.

  The power control unit 108 turns on or off the power of the remote recorder 110.

== Broadcasting time assignment ==
When recording the video signal 150 in the storage 105, the recording control unit 104 records the recording start time of the video signal 150 and the elapsed time of each scene. Thereby, when the video signal 150 is reproduced, the broadcast time of each scene of the video signal 150 can be known == Summary ==
Each component of the local recorder 100 and the remote recorder 110 may be realized by hardware, or realized as software operating on a central processing unit (CPU) included in the local recorder 100 and the remote recorder 110. May be. The remote recorder 110 may have some or all of the functions of the local recorder 100. The local recorder 100 may have some or all of the functions of the remote recorder 110. A specific configuration of the local recorder 100 and the remote recorder 110 will be described later with reference to the drawings. As is clear from the above description, the same numbers are assigned to the functional blocks common to the local recorder 100 and the remote recorder 110. Next, functions of the local recorder 100 and the remote recorder 110 will be described.

== Function of Local Recorder 100 ==
The local recorder 100 has a recording function, a playback function, a network reception function, a chasing playback function, and a remote chasing playback function unique to the system of this embodiment.

== Recording Function of Local Recorder 100 ==
The recording function of the local recorder 100 will be described. The tuner 102 of the local recorder 100 receives the video signal 150 from the broadcast wave via the antenna 120 and outputs it to the recording control unit 104 of the local recorder 100. The recording control unit 104 of the local recorder 100 outputs the input video signal 150 to the storage 105 of the local recorder 100. The storage 105 of the local recorder 100 records the input video signal 150.

== Correspondence between Video Signal 150 of Local Recorder 100 and Broadcast Time ==
The recording control unit 104 of the local recorder 100 records in the storage 105 the time when the video signal 150 was broadcast together with the video signal 150 and the elapsed time since the recording of the video signal 150 started. Thereby, the local recorder 100 can know the time when each scene of the video signal 150 recorded in the storage 105 of the local recorder 100 was broadcast. Furthermore, the broadcast time can be designated and reproduced from a specific scene of the video signal 150.

== Reproduction function of local recorder 100 ==
The playback function of the local recorder 100 will be described. The reproduction control unit 106 of the local recorder 100 selects the video signal 150 output from the transfer control unit 103, the video signal 150 output from the storage 105, and the video signal 150 output from the recording control unit 104, and outputs the video output unit 107. Output to.

== Network reception function of local recorder 100 ==
The network reception function of the local recorder 100 will be described. The transfer controller 103 of the local recorder 100 communicates with the transfer controller 103 of the remote recorder 110 and receives the video signal 150 recorded by the remote recorder 110 from the remote recorder 110. At this time, the transfer control unit 103 of the local recorder 100 designates the broadcast time of recording to be transferred by the remote recorder 110, and receives the video signal 150 from the designated broadcast time.

== Chasing playback function of local recorder 100 ==
The chasing playback function of the local recorder 100 will be described. While recording the video signal 150 with the local recorder 100, the recorded video signal 150 is reproduced. At this time, the video signal 150 to be reproduced is the video signal 150 of the scene before the scene currently being broadcast. If playback is performed at a speed faster than that of the recorded video signal 150 by Y double speed playback (Y is a natural number of 2 or more, etc.), the broadcast time of the scene being played back can be brought closer to the current time. This is called chasing playback.

== Function of Remote Recorder 110 ==
The remote recorder 110 has a recording function, a network transmission function, and a remote chasing playback function.

== Recording Function of Remote Recorder 110 ==
The recording function of the remote recorder 110 will be described. The tuner 102 of the remote recorder 110 receives the video signal 150 from the broadcast wave via the antenna 120 and outputs it to the recording control unit 104 of the remote recorder 110. The recording control unit 104 of the remote recorder 110 outputs the input video signal 150 to the storage 105 of the remote recorder 110. The storage 105 of the remote recorder 110 records the input video signal 150.

== Correspondence between Video Signal 150 of Remote Recorder 110 and Broadcast Time ==
The recording control unit 104 of the remote recorder 110 records in the storage 105 the elapsed time from the start of recording the video signal 150 at the time when the video signal 150 was broadcast together with the video signal 150. Thereby, the remote recorder 110 can know the time when each scene of the video signal 150 recorded in the storage 105 of the remote recorder 110 was broadcast. Furthermore, the scene of the video signal 150 can be reproduced by designating the broadcast time.

== Network transmission function of remote recorder 110 ==
The network transmission function of the remote recorder 110 will be described. The transfer control unit 103 of the remote recorder 110 communicates with the transfer control unit 103 of the local recorder 100 and transmits the video signal 150 recorded by the remote recorder 110 to the local recorder 100. At this time, when the broadcast time of the video signal 150 transmitted by the transfer control unit 103 of the local recorder 100 is designated, the video signal 150 is transmitted from the designated broadcast time.

== Remote chasing playback function (local recording, remote transmission) ==
Next, the remote chasing playback function in this embodiment will be described. The remote recorder 110 transmits the video signal 150 from the broadcast time designated by the local recorder 100 to the local recorder 100. At this time, the transmitted video signal 150 is a video signal 150 of a scene before the scene currently being broadcast. While recording the video signal 150 with the local recorder 100, the video signal 150 is received from the remote recorder 110 and reproduced. Thereby, the time of the scene of the video signal being reproduced can be brought closer to the start time of the video signal being recorded. This is called remote chasing playback.

== Remote chase playback time chart ==
Next, the processing flow of remote follow-up reproduction in the present embodiment will be described. FIG. 2 is a time chart for explaining the processing flow of remote follow-up reproduction.

  Time T1: When recording is started by the remote recorder 110, the tuner 102 of the remote recorder 110 receives the video signal 150 from the broadcast wave via the antenna 120 and outputs it to the recording control unit 104 of the remote recorder 110. The recording control unit 104 of the remote recorder 110 outputs the input video signal 150 to the storage 105 of the remote recorder 110. The storage 105 of the remote recorder 110 starts recording the input video signal 150.

  Time T2: When remote chasing playback is started at the local recorder 100, the tuner 102 of the local recorder 100 receives the video signal 150 from the broadcast wave via the antenna 120 and outputs it to the recording control unit 104 of the local recorder 100. The recording control unit 104 of the local recorder 100 outputs the input video signal 150 to the storage 105 of the local recorder 100. The storage 105 of the local recorder 100 starts recording the input video signal 150. Further, the transfer control unit 103 of the local recorder 100 transmits a remote follow-up reproduction request 401 to the transfer control unit 103 of the remote recorder 110.

  Time T3: When the transfer control unit 103 of the remote recorder 110 receives the remote follow-up playback request 401 from the transfer control unit 103 of the local recorder 100, the storage 105 of the remote recorder 110 controls the transfer of the recorded video signal 150 to the remote recorder 110. Output to the unit 103. The transfer control unit 103 of the remote recorder 110 outputs the input video signal 150 to the NIC 101 of the remote recorder 110. At the time of this output, it is preferable that the video signal 150 is converted into X-times speed reproduction data (X is a natural number of 2 or more) and compressed as shown in FIG. This is because the capacity of the video signal 150 transmitted via the network 140 can be reduced rather than performing double speed conversion and compression on the local recorder 100 side. The NIC 101 of the remote recorder 110 transmits the input video signal 150 to the local recorder 100. At this time, recording by the remote recorder 110 may be stopped. The remote recorder 110 records time T3.

  Time T4: When the NIC 101 of the local recorder 100 receives the video signal 150 from the remote recorder 110, the NIC 101 of the local recorder 100 outputs the video signal 150 to the transfer control unit 103 of the local recorder 100. The transfer control unit 103 of the local recorder 100 outputs the input video signal 150 to the reproduction control unit 106 of the local recorder 100. The playback control unit 106 of the local recorder 100 outputs the input video signal 150 to the video output unit 107 of the local recorder 100. The video output unit 107 of the local recorder 100 outputs the input video signal 150 to the display device 130. The above is remote chasing playback (A).

  Time T5: When all the video signals 150 recorded from the time T1 to the time T3 by the remote recorder 110 are transmitted to the local recorder 100, the remote recorder 110 stops transmitting the video signal 150 to the local recorder 100. At this time, the power controller 108 of the remote recorder 110 may turn off the power of the remote recorder 110.

  Time T6: When the recording time of the video signal 150 received from the remote recorder 110 reaches the time T2 when the remote chasing playback is started by the local recorder 100, the storage 105 of the local recorder 100 records the video signal 150 recorded from the time T2. Is output to the reproduction control unit 106 of the local recorder 100. The playback control unit 106 of the local recorder 100 outputs the input video signal 150 to the video output unit 107 of the local recorder 100. The video output unit 107 of the local recorder 100 outputs the input video signal 150 to the display device 130. The above is local chasing playback (B).

  Time T7: When the recording time of the video signal 150 output from the time T6 to the display device 130 at the local recorder 100 approaches the current time within a specified time, the tuner 102 of the local recorder 100 passes through the antenna 120. The video signal 150 is received from the broadcast wave and output to the reproduction control unit 106 of the local recorder 100. The playback control unit 106 of the local recorder 100 outputs the input video signal 150 to the video output unit 107 of the local recorder 100. The video output unit 107 of the local recorder 100 outputs the input video signal 150 to the display device 130. The above is the live reproduction (C). At this time, recording on the local recorder 100 may be stopped. The specified time means that the video signal 150 input from the tuner 102 of the local recorder 100 and the video signal 150 output from the tuner 102 of the local recorder 100 are recorded in the storage 105 and output to the playback control unit 106 of the local recorder 100. It is determined from the difference with the time until.

== Remote chase playback flowchart ==
FIG. 3 is a flowchart for explaining a processing flow of remote follow-up reproduction in the system of this embodiment. FIG. 4 is a diagram showing a data structure used for communication in the system of this embodiment.

== Remote chasing playback flowchart (local recorder 100) ==
Hereinafter, the process of the local recorder 100 in the remote chasing playback will be described.

  In FIG. 3, in step S <b> 101, the local recorder 100 transmits a remote follow-up reproduction request 401 to the remote recorder 110. A remote follow-up reproduction request 401 is made and the process proceeds to step S102.

  In step S102, the local recorder 100 starts recording. Recording by the local recorder 100 is performed as follows. The tuner 102 of the local recorder 100 receives the video signal 150 from the broadcast wave via the antenna 120 and outputs it to the recording control unit 104 of the local recorder 100. The recording control unit 104 of the local recorder 100 outputs the input video signal 150 to the storage 105 of the local recorder 100. The storage 105 of the local recorder 100 records the input video signal 150. The local recorder 100 advances the process to step S103 while continuing the above recording operation.

  In step S103, the local recorder 100 receives the video signal 150 from the remote recorder 110. For receiving the video signal 150 from the remote recorder 110, an HTTP (Hypertext Transfer Protocol) protocol is used. The HTTP protocol is a guideline defined by DLNA (Digital Living Network Alliance), which is a standardization organization for using digital contents in home networks, and is used as a transfer protocol for digital contents.

  In step S104, the local recorder 100 displays the video signal 150 received from the remote recorder 110 in step 103. The video signal 150 received from the remote recorder 110 is displayed as follows. When the NIC 101 of the local recorder 100 receives the video signal 150 from the remote recorder 110, the NIC 101 of the local recorder 100 outputs the video signal 150 to the transfer control unit 103 of the local recorder 100. The transfer control unit 103 of the local recorder 100 outputs the input video signal 150 to the reproduction control unit 106 of the local recorder 100. The playback control unit 106 of the local recorder 100 outputs the input video signal 150 to the video output unit 107 of the local recorder 100. The video output unit 107 of the local recorder 100 outputs the input video signal 150 to the display device 130. The local recorder 100 performs the above processing and proceeds to step S105.

  In step S105, the local recorder 100 determines whether or not the reception is completed. If the reception is not completed, the process proceeds to step S103. If the reception is completed, the IP connection with the remote recorder 110 is disconnected and the process proceeds to step S106. If the broadcast time of the video information transmitted from the remote recorder 110 exceeds the time when the recording was started in S102, it is determined that the reception has been completed. This is because the video signal 150 after the recording start time in S102 is recorded in the storage 105 of the local recorder 100 without being received from the remote recorder 110 and can be reproduced by the local recorder 100.

  In step S106, the local recorder 100 performs local chasing playback. Local chasing playback is performed as follows. The storage 105 of the local recorder 100 outputs the video signal 150 recorded from step S102 to the reproduction control unit 106 of the local recorder 100. The playback control unit 106 of the local recorder 100 outputs the input video signal 150 to the video output unit 107 of the local recorder 100. The video output unit 107 of the local recorder 100 outputs the input video signal 150 to the display device 130. The local recorder 100 performs the above processing and proceeds to step S107. In local follow-up playback, the recording time of the playback video can be gradually brought closer to the actual time by playing back the video faster than the speed of the broadcast video signal 150.

  In step S107, the local recorder 100 determines whether or not the local follow-up reproduction has caught up with the broadcast. If the broadcast has not caught up with the broadcast, the process proceeds to step S106, and if it has caught up with the broadcast, the process proceeds to step S108. Whether or not the local chasing playback has caught up with the broadcast is determined to have caught up when the difference between the recording time and the actual time of the video signal 150 reproduced by the local chasing playback is equal to or less than the set time. The set time is, for example, 1 second. An arbitrary time can be set in consideration of the time from reception of the broadcast wave in step S102 to recording in the storage 105.

  In step S108, the video signal 150 being broadcast is displayed. The video signal 150 being broadcast is displayed as follows. The tuner 102 of the local recorder 100 receives the video signal 150 from the broadcast wave via the antenna 120 and outputs it to the reproduction control unit 106 of the local recorder 100. The playback control unit 106 of the local recorder 100 outputs the input video signal 150 to the video output unit 107 of the local recorder 100. The video output unit 107 of the local recorder 100 outputs the input video signal 150 to the display device 130. The local recorder 100 advances the process to step S109 while displaying the video signal 150 being broadcast.

  In step S109, the recording started in step S102 is stopped.

  The remote chasing playback process of the local recorder 100 is thus completed.

  However, in step S103, the HTTP protocol is used to transfer the video signal 150, but other transfer protocols such as an FTP (File Transfer Protocol) protocol and an RTP (Real-time Transfer Protocol) protocol may be used. In step S105, the local recorder 100 disconnects the IP (Internet Protocol) connection and notifies the remote recorder 110 of the completion of reception. However, the local recorder 100 uses another communication protocol such as the HTTP protocol without disconnecting the IP connection. The remote recorder 110 may be notified of reception completion. Further, although the recording started in step S102 is stopped in step S109, the recording may be continued without stopping.

== Remote chasing playback flowchart (remote recorder 110) ==
Hereinafter, the process of the remote recorder 110 in the remote follow-up reproduction will be described.

  In FIG. 3, when the remote recorder 110 starts in step S201, it enters a recording request waiting state and waits for a recording request to be made. The recording request is made by a user operation. If a recording request is received, the process proceeds to step S202.

  In step S202, the remote recorder 110 starts recording. Recording by the remote recorder 110 is performed as follows. The tuner 102 of the remote recorder 110 receives the video signal 150 from the broadcast wave via the antenna 120 and outputs it to the recording control unit 104 of the remote recorder 110. The recording control unit 104 of the remote recorder 110 outputs the input video signal 150 to the storage 105 of the remote recorder 110. The storage 105 of the remote recorder 110 records the input video signal 150. The remote recorder 110 advances the process to step S203 while continuing the above recording operation.

  In step S203, the remote recorder 110 waits for the remote chasing playback request 401 and waits for the remote chasing playback request 401 to be performed. The remote chasing playback request 401 is made by the local recorder 100. When the remote follow-up reproduction request 401 is received, the process proceeds to step S204.

  In step S204, the remote recorder 110 stops recording. The process proceeds to step S205.

  In step S <b> 205, the remote recorder 110 transmits the recorded video signal 150 to the local recorder 100. Note that the HTTP protocol is used to transmit the video signal 150 to the local recorder 100 as described above. Further, the remote recorder 110 can transmit the recorded video signal 150 at a transmission speed faster than the original reproduction speed. This transmission speed may be a speed at which the remote recorder 110 transmits and the local recorder 100 can sufficiently receive. Furthermore, this transmission speed may be specified by the local recorder 100 to the remote recorder 110, or the remote recorder 110 may be specified to the local recorder 100. When the local recorder 100 receives the video signal 150 at a transmission speed faster than the reproduction speed, the local recorder 100 stores the video signal 150 in the storage 105.

  Next, the process proceeds to step S206. In step S206, the remote recorder 110 determines whether or not the transmission is completed. If the transmission is not completed, the process proceeds to step S205. If the transmission is completed, the process proceeds to step S207. The completion of transmission is determined by disconnecting the IP connection with the local recorder 100.

  In step S207, the remote recorder 110 turns off the power.

  Thus, the remote chasing playback process of the remote recorder 110 is completed.

  However, in step S201, the recording request is made by a user operation, but may be made by a request from the local recorder 100. Furthermore, although the recording is stopped in step S204, the recording may be continued without stopping the recording. In step S205, the HTTP protocol is used to transfer the video signal 150, but other transfer protocols such as the FTP protocol and the RTP protocol may be used. Further, in step 206, the transmission completion is determined by disconnecting the IP connection, but the transmission completion message is received from the local recorder 100 using another communication protocol such as the HTTP protocol without disconnecting the IP connection. The transmission completion may be determined as follows. Further, in step S207, the power may be turned on continuously without turning off the power.

  The remote recorder 110 may transmit video signals to a plurality of local recorders 100 simultaneously. In this case, the remote recorder 110 determines completion of transmission to all the local recorders 100 and turns off the power.

== System configuration diagram ==
A specific example of the configuration of the local recorder 100 and the remote recorder 110 is shown in FIG. In the figure, the remote recorder 110 will be described, but the local recorder 100 has the same configuration. In the figure, a remote recorder 110 includes a CPU 510 serving as a processing unit, a memory 520 and HDD 530 serving as a storage unit, a NIC 101 and a tuner 102 serving as a transmission / reception unit, a video output unit 107, and a power supply control unit 108. It consists of a bus 540. The transfer control unit 103, the recording control unit 104, and the reproduction control unit 106 illustrated in FIG. 1 can be realized as a program that operates on the CPU 510 that is a processing unit, as described above.

== Detailed communication ==
As shown in FIG. 4A, the remote follow-up reproduction request 401 used in steps S101 and S203 includes a channel number 411 and a time 412. In step S101 in FIG. 3, the local recorder 100 designates the channel number 411 and time 412 for performing the remote follow-up reproduction, and transmits a remote follow-up reproduction request 401 to the remote recorder 110. In step S203, the remote recorder 110 receives the remote chasing playback request 401 from the local recorder 100, and determines the video signal 150 to be transmitted to the local recorder 100 based on the channel number 411 and time 412 included in the remote chasing playback request 401.

  In step S103 and step S205, the video signal transmission request 402 and the video signal transmission response 403 shown in FIGS. 4B and 4C are used. In step S103, in order to receive the video signal 150 from the remote recorder 110, the local recorder 100 transmits a video signal transmission request 402 including the time 412 and the period 413 of the video signal 150 in the range to be received to the remote recorder 110. Further, a video signal transmission response 403 is received as a response to the video signal transmission request 402, and a video signal 150 in a range desired to be received from the remote recorder 110 is received. In step S205, the remote recorder 110 receives the video signal transmission request 402 from the local recorder 100, determines the video signal 150 to be transmitted to the local recorder 100 according to the time 412 and the period 413 included in the video signal transmission request 402, and transmits the video signal. It is included in the response 403 and transmitted to the local recorder 100. The video signal transmission response 403 includes a time 412 and a period 413.

== Linking from remote chasing playback to local chasing playback ==
The local recorder 100 has a clock for knowing the current time. When the time 412 of the video signal transmission response 403 transmitted from the remote recorder 110 reaches the current time, the local recorder 100 stops displaying the remote follow-up playback video signal consisting of steps S103, S104, and S105, and steps 106 and 107. Local chasing playback video display consisting of

== Stop of remote recorder ==
The remote recorder 110 can turn off the power when transmission of the video signal 150 to the local recorder 100 is completed. The end of transmission of the video signal 150 can be detected by disconnection of the communication connection with the local recorder 100 or a transmission end request from the local recorder 100.

== Connection of multiple local recorders to the remote recorder ==
The remote recorder 110 can be connected to a plurality of local recorders 100 and transmit a video signal 150. The remote recorder 110 recognizes the connected local recorder, and when the connected local recorder 100 is lost, the power can be turned off.

== Summary ==
According to the embodiment described in detail above, a video signal recorded from a remote recorder connected to a network can be received and chased and reproduced by a local recorder.

  Furthermore, while chasing and playing the video signal recorded with the remote recorder connected to the network, recording the video signal with the local recorder, and chasing and playing the video signal recorded with the remote recorder until the broadcast time of the video signal recorded with the local recorder, Chasing playback can be continued with the video signal recorded in the local recorder, and reception of the video signal from the remote recorder can be stopped.

  Further, when the reception of the video signal from the remote recorder is stopped, the power of the remote recorder can be turned off.

  In the above description of the embodiment, the video signal has been described as an example, but the present invention can be similarly applied to an audio signal. It is needless to say that the network can be applied to a network system specifically defined by IEEE 802.3, IEEE 802.11, IEEE 802.15, etc., and can be applied to other network systems.

1 is a system configuration diagram of a recording / playback system according to a first embodiment. The time chart for demonstrating the processing flow of the remote chase reproduction | regeneration of a 1st Example. The flowchart figure for demonstrating the processing flow of the remote chase reproduction | regeneration of a 1st Example. The figure which shows the data structure used by communication of a 1st Example. The figure which shows one specific example of the system configuration | structure of the recorder used in a 1st Example.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 100 ... Local recorder, 101 ... NIC, 102 ... Tuner, 103 ... Transfer control part, 104 ... Recording control part, 105 ... Storage, 106 ... Playback control part, 107 ... Video output part, 108 ... Power supply control part, 110 ... Remote Recorder, 120 ... Antenna, 130 ... Display device, 140 ... Network, 150 ... Video signal, 401 ... Remote chasing playback request, 402 ... Video signal transmission request, 403 ... Video signal transmission response, 411 ... Channel number, 412 ... Time, 413 ... period, 510 ... CPU, 520 ... memory, 530 ... HDD, 540 ... internal bus.

Claims (10)

A system for receiving broadcast waves and recording and reproducing video signals of programs,
A first tuner that outputs a video signal of the program; a first recording unit that records the video signal of the program output by the first tuner; A remote recorder comprising a first transmission / reception unit for transmitting a video signal of the program recorded by the first recording unit;
A second tuner for outputting the video signal of the program; a second recording unit for recording the video signal of the program output by the second tuner; and transmitting the remote follow-up reproduction request to the remote recorder. The video signal of the previous scene of the program is received from the remote recorder, the video signal of the program output from the second tuner, and the video recorded by the second recording unit. A local recorder including a video signal of a program and a playback control unit that controls playback of the video signal received by the second transmission / reception unit;
Tona is,
The remote chasing playback request includes a channel number and time information of the program . The recording / playback system according to claim 1,
The second transmission / reception unit of the local recorder sends a recorded video signal transmission request for requesting transmission of the video signal recorded by the remote recorder to the first recording unit based on the remote chasing playback request. A recording / playback system that transmits to the recorder . The recording / playback system according to claim 2,
The first transmission / reception unit of the remote recorder transmits a recorded video signal response including the video signal recorded in the first recording unit to the local recorder in response to the recorded video signal transmission request. /> Recording and playback system. The recording / playback system according to claim 3,
When transmitting the video signal as the recorded video signal response, the remote recorder converts the video signal to be transmitted into double-speed playback data and transmits the video signal . A recording / playback method in a local recorder that receives broadcast waves and records and plays back video signals of a program,
The local recorder is
Sending a remote follow-up playback request to a remote recorder connected via a network, receiving from the remote recorder a video signal of a scene prior to the currently broadcast scene of the program recorded by the remote recorder,
While playing the received video signal of the program faster than the original playback speed,
Recording the video signal of the currently broadcast scene of the program received by the tuner of the local recorder into the storage unit of the local recorder,
The remote recorder receives the remote chasing playback request from the local recorder, stops recording,
When transmitting the video signal of the program recorded by the remote recorder to the local recorder, the remote recorder converts the video signal to be transmitted into double speed reproduction data and transmits the video signal.
Recording playback method . The recording / reproducing method according to claim 5 ,
When the video signal of the program from the remote recorder is received and played back by the tuner of the local recorder and reaches the scene of the video signal of the program recorded in the storage unit, the video signal from the remote recorder The recording / playback method of stopping the reception and playback of the video signal of the program and starting the playback of the video signal of the program recorded in the storage unit . The recording / reproducing method according to claim 6,
When the reproduction of the video signal of the program recorded in the storage unit of the local recorder reaches the scene received by the tuner of the local recorder, the video of the program received by the tuner of the local recorder Start signal playback <br/> How to record and playback. The recording / reproducing method according to claim 6 ,
The recording / reproducing method , wherein the video signal of the program recorded in the storage unit of the local recorder is reproduced at double speed reproduction . A remote recorder that receives broadcast waves and records video signals of programs,
A tuner for outputting a video signal of the program;
A video recording unit for recording a video signal of the program output by the tuner, and receiving a remote follow-up playback request from a local recorder connected via a network;
A transmission / reception unit that receives the remote follow-up reproduction request from the local recorder and transmits the video signal of a scene before the video signal of the program currently recorded by the recording unit to the local recorder;
With
The transmission / reception unit includes a video signal of the program in a scene at a time requested from the local recorder.
Send
Remote recorder . The remote recorder according to claim 9 , wherein
The transmission / reception unit stops transmission when transmitting the video signal of the program to the local recorder until the scene at the time when the local recorder starts recording the video signal of the program.
Remote recorder .

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