JP2008078705A - Digital/analog broadcast receiver and digital/analog broadcast recording and reproducing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a digital/analog broadcast recording and reproducing device which invalidates functions relating to analog broadcasting after stop of analog broadcasting and allows the functions relating to analog broadcasting to be surely used till the stop of analog broadcasting. <P>SOLUTION: A DVD-integrated television 10 includes a tuner 12 for receiving both analog broadcast and digital broadcast and a DVD recording and reproducing part 16 for recording and reproducing received broadcast into and from a DVD and scans channels of analog broadcasting at intervals of a first prescribed time, and invalidates the functions relating to analog broadcasting when analog broadcasting is not found. After the functions relating to analog broadcasting are invalidated, the DVD-integrated television 19 scans channels of analog broadcasting at intervals of a second prescribed time and validates the functions relating to analog broadcasting when analog broadcasting is found, and stops channel scan of analog broadcasting when analog broadcasting is not found for a prescribed time. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a digital / analog broadcast receiving apparatus and a digital / analog broadcast recording / reproducing apparatus capable of receiving both an analog broadcast and a digital broadcast.

  Currently, Japan and the United States are in a transition period from terrestrial analog broadcasting to terrestrial digital broadcasting worldwide, and a mixture of analog broadcasting and digital broadcasting will continue until the terrestrial analog broadcasting ends (stops). For this reason, broadcast receivers that are currently sold are mainly those that can receive both analog broadcasts and digital broadcasts.

  However, when the digital / analog broadcast receiving apparatus or the digital / analog broadcast recording / reproducing apparatus capable of receiving both analog broadcast and digital broadcast is continuously used, the analog broadcast stops when the time comes. At this time, various techniques have been proposed that allow the receiving apparatus to appropriately cope with the problem.

  For example, Patent Literature 1 discloses a broadcast receiving device and a broadcast recording / playback device that stop power supply to an analog broadcast reception processing unit and invalidate functions related to analog broadcast by a predetermined switching operation by a user. .

Japanese Patent Application Laid-Open No. H10-228561 discloses detecting the abolition of analog broadcasting by periodically performing channel scanning.
JP 2006-108974 A JP 2006-5785 A

  According to Patent Document 1 and Patent Document 2 described above, when analog broadcasting stops due to the time, functions related to analog broadcasting can be invalidated. However, according to Patent Document 2, when the channel scan is performed, the analog broadcast is judged to have stopped even if the analog broadcast cannot be received accidentally because of a broadcast accident or the like rather than the analog broadcast stop time. There is a risk that. In this case, the original purpose cannot be achieved.

  A digital / analog broadcast receiving apparatus and a digital / analog broadcast capable of invalidating a function related to an analog broadcast after the stop of the analog broadcast and reliably using the function related to the analog broadcast until the stop of the analog broadcast An object is to provide a recording / playback apparatus.

To achieve the above object, the present invention provides a digital / analog broadcast receiving apparatus capable of receiving both analog broadcast and digital broadcast.
When the analog broadcast is scanned at the first predetermined time interval and the analog broadcast is not found, the function related to the analog broadcast is disabled,
After invalidating the function related to the analog broadcast, the analog broadcast channel scan is performed at a second predetermined time interval, and if the analog broadcast is found, the function related to the analog broadcast is validated.

  In the above digital / analog broadcast receiving apparatus, after invalidating the function related to the analog broadcast, the analog broadcast channel scan is performed at the second predetermined time interval. It is desirable to stop the channel scan.

  In the digital / analog broadcast receiving apparatus, the analog broadcast function is an analog broadcast channel reception function. When the function is disabled, it is desirable to skip the analog broadcast channel when selecting a channel.

  The present invention also provides a digital / analog broadcast recording / reproducing apparatus comprising the above digital / analog broadcast receiving apparatus and a recording / reproducing unit for recording and reproducing the broadcast received by the digital / analog broadcast receiving apparatus on a recording medium. To do.

  In the digital / analog broadcast recording / playback apparatus, the function related to the analog broadcast can be, for example, a recording function of an analog broadcast channel.

When the present invention is embodied, in a digital / analog broadcast recording / playback apparatus including a tuner that receives both analog broadcast and digital broadcast, and a DVD recording / playback unit that records and plays back the received broadcast on a DVD,
When the analog broadcast channel scan is performed at the first predetermined time interval and the analog broadcast is not found, the analog broadcast channel reception function and the analog broadcast channel recording function are disabled, and the analog broadcast channel is skipped at the time of channel selection.
After the analog broadcast channel reception function and the analog broadcast channel recording function are disabled, the analog broadcast channel scan is performed at a second predetermined time interval, and if an analog broadcast is found, the analog broadcast channel reception function and analog The broadcast channel recording function is enabled to select an analog broadcast channel at the time of channel selection. On the other hand, when an analog broadcast is not found for a predetermined period, the analog broadcast channel scan is stopped.

  According to the present invention, even if analog broadcasting cannot be received accidentally due to a broadcast accident or the like, and the function related to analog broadcasting is invalidated, the analog broadcasting is not erroneously determined to be stopped. When returning, the function related to analog broadcasting is enabled and received. Therefore, after the analog broadcast is stopped, the function related to the analog broadcast can be invalidated, and the function related to the analog broadcast can be surely used until the analog broadcast is stopped.

  The following description will be made using ATSC (Advanced Television Systems Committee) digital broadcasting and NTSC (National Television Standards Committee) analog broadcasting adopted in North America, but the present invention can be applied to other systems as well.

  In the present embodiment, a DVD-integrated television will be described as an example of a digital / analog broadcast receiving apparatus and a digital / analog broadcast recording / reproducing apparatus. However, the present invention is not limited to a broadcast receiving apparatus such as a television receiver or a DVD apparatus. The present invention can also be applied to broadcast recording / playback apparatuses.

  FIG. 1 is a block diagram showing a configuration of a DVD-integrated television 10. The DVD-integrated television 10 is connected to an antenna 30 for receiving a television broadcast signal transmitted from a broadcasting station using a high-frequency radio wave having a predetermined frequency. Then, the DVD-integrated television 10 receives an instruction from the remote controller 40. The remote controller 40 performs various operations such as channel selection of a TV program to be viewed, TV program viewing reservation and recording reservation, and is operated by a user. The remote controller 40 includes various buttons (not shown) that enable these operations. When the various buttons are operated, a wireless signal such as an infrared signal corresponding to the operation is transmitted.

  The DVD-integrated television 10 receives an ATSC broadcast signal and an NTSC broadcast signal transmitted from a broadcast station via an antenna 30, and displays a television program distributed by these broadcast signals on a monitor, A DVD device that records a television program distributed by a broadcast signal is integrated. An HDD device or a video device can also be used as a recording device.

  The DVD-integrated television 10 includes a remote control receiver 11, a tuner 12, an NTSC decoder 13, an MPEG encoder 14, an ATSC front end 15, a DVD recording / playback unit 16, an MPEG decoder back end 17, and an OSD circuit 18. And a monitor 19, a memory 20, a clock 21, and a control unit 22.

  The remote control receiving unit 11 receives a signal sent from the remote control 40 and outputs a signal corresponding to an operation on the remote control 40 to the control unit 22. The tuner 12 tunes the reception frequency to a frequency corresponding to the channel selected and operated by the remote controller 40, thereby receiving the television broadcast signal of the channel selected and operated via the antenna 30.

  When an NTSC broadcast channel is selected by the remote controller 40, the NTSC decoder 13 demodulates the NTSC broadcast signal received by the tuner 12 into a video signal and an audio signal of a television program, and converts the video signal and the audio signal into an MPEG encoder. 14 to output. The MPEG encoder 14 digitally compresses and encodes the video signal and audio signal output from the NTSC decoder 13 according to the MPEG standard, and outputs the result to the MPEG decoder back end 17.

  The ATSC front end 15, when an ATSC broadcast channel is selected by the remote controller 40, images of a plurality of television programs obtained by digitally compression-coding the ATSC signal modulated by the 8VSB system received by the tuner 12 according to the MPEG standard. And a signal such as audio and electronic program information are demodulated into a TS (Transport Stream) signal in a time-division multiplexed state. Then, the ATSC front end 15 separates and extracts the video signal and audio signal of the TV program of the channel selected by the remote controller 40 from this TS signal and outputs it to the MPEG decoder back end 17 and also extracts the electronic program information. To the control unit 22.

  The DVD recording / reproducing unit 16 records the video signal and the audio signal output from the MPEG encoder 14 and the ATSC front end 15 on the DVD under the control of the control unit 22, and the video signal and the audio recorded on the DVD. The signal is reproduced and output to the MPEG decoder back end 17. Note that an HDD recording / playback unit or video recording / playback unit may be employed as the recording / playback unit. A plurality of recording / playback units may be provided.

  The MPEG decoder back end 17 receives a video signal and an audio signal that are digitally compressed and encoded according to the MPEG standard and output from the MPEG encoder 14, the ATSC front end 15, and the DVD recording / playback unit 16. The MPEG decoder back end 17 decodes these video signals and audio signals into signals before being subjected to digital compression coding, thereby generating a signal for displaying video on the monitor 19 and outputting audio. The video signal output from the MPEG decoder back end 17 is output to the monitor 19 via the OSD circuit 18.

  The OSD circuit 18 superimposes predetermined on-screen display data such as a channel number and an EPG screen on the video signal output from the MPEG decoder back end 17. As a result, an image based on the on-screen display data is displayed on the monitor 19 so as to be superimposed on the video of the television program.

  The memory 20 stores reservation data, frequency data of television broadcast signals of each channel, and various on-screen display data. The clock 21 measures the date and time and outputs the signal to the control unit 22.

  When an NTSC broadcast channel is selected by the remote controller 40, the control unit 22 causes the tuner 12 to receive an NTSC broadcast signal of the selected channel, and causes the NTSC decoder 13 to receive a video signal and an audio signal. Is demodulated and reproduced. In addition, when an ATSC broadcast channel is selected by the remote controller 40, the tuner 12 receives an ATSC broadcast signal of the selected channel, and an image of the channel selected by the ATSC front end 15 is received. The signal and the audio signal are separated and extracted.

  Further, when a program viewing reservation or recording reservation operation is performed by the remote controller 40, the control unit 22 makes a program viewing reservation or recording reservation, and stores the program reservation data in the memory 20.

  When the DVD-integrated television 10 is installed and both the NTSC broadcast and the ATSC broadcast can be received, the NTSC broadcast channel is switched in order by operating the up / down key (not shown) of the remote controller 40. Subsequently, the ATSC broadcast channel is sequentially switched. In addition, even when performing scheduled recording on a DVD, if the up / down key is operated in the scheduled recording mode, the NTSC broadcast channel is sequentially switched, and then the ATSC broadcast channel is sequentially switched, so that recording of a desired channel can be reserved. it can.

  Next, an operation for appropriately responding to a stop of NTSC broadcasting (analog broadcasting) will be described. FIG. 2 is a flowchart showing the operation of the DVD-integrated television 10 to cope with the NTSC broadcast stoppage.

  If the NTSC broadcast (analog broadcast) has not stopped, first, a channel scan of the NTSC broadcast is performed in step S10. This channel scan can be executed when the tuner 12 is not used, such as in a standby state or during DVD playback, and when it overlaps with the time of receiving a broadcast signal, such as the time reserved for recording or the time of auto clock processing, Execute by shifting around the time. If two or more tuners are provided, channel scanning can be performed at any time.

  When the channel scan is executed, the process proceeds to step S11 to determine whether or not an NTSC broadcast is found. This determination may be performed based on a conventional channel scanning method. If an NTSC broadcast is found in step S11, the process proceeds to step S12. If not found, the process proceeds to step S13.

  In step S12, it is determined whether or not a predetermined time (first predetermined time) has elapsed. If a predetermined time elapses in step S12, the process returns to step S10 and the channel scan is executed again. By repeating the operations in steps S10 to S12, a channel scan for NTSC broadcasting is performed at predetermined time intervals. The predetermined time here can be set to 24 hours, for example. In this case, the channel scan is repeated every 24 hours to monitor the presence or absence of the NTSC broadcast.

  On the other hand, in step S13, it is determined that there is a possibility that the NTSC broadcast has stopped, and the functions related to the NTSC broadcast are invalidated. The functions related to the NTSC broadcast include an NTSC broadcast channel reception function, an NTSC broadcast channel recording function, and an NTSC broadcast electronic program information display function.

  When these functions are disabled, it is desirable to skip the NTSC broadcast channel when selecting a channel. As a result, when operating the up / down key of the remote controller 40 to sequentially switch the received channel or switch the recording reservation channel, the NTSC broadcast channel is skipped and only the ATSC broadcast channel is sequentially switched. Therefore, it is not necessary to press the up / down key many times to skip the NTSC broadcast channel during viewing, and it is not necessary to make a reservation for recording a channel that does not appear, thereby improving usability.

  If these functions are disabled, when the NTSC broadcast channel is selected at the time of channel selection or when the NTSC broadcast channel is selected as a recording reservation channel, the monitor 19 cannot receive the NTSC broadcast. A message may be displayed. By doing so, there is no need to make a recording reservation for a channel that is not shown, which improves usability.

  Next, the process proceeds from step S13 to step S14 to determine whether or not a predetermined time (second predetermined time) has elapsed. If the predetermined time has elapsed, the process proceeds to step S15 to perform a channel scan for NTSC broadcasting. The predetermined time here is preferably shorter than the predetermined time in step S12, for example, 1 hour or 6 hours. This is because the channel scan in step S15 is frequently performed to confirm whether the NTSC broadcast has stopped reliably. By shortening the predetermined time as much as possible in consideration of the burden on the apparatus, it is possible to respond immediately when NTSC broadcasting can be received.

  Next, it progresses to step S16 from step S15, and it is determined whether the NTSC broadcast was found. This determination may be performed in the same manner as in step S11. If an NTSC broadcast is found in step S16, the process proceeds to step S17. If not found, the process proceeds to step S18.

  In step S17, it is determined that the NTSC broadcast has not stopped, and the functions related to the NTSC broadcast are validated. The function enabled here is the function disabled in step S13. Since the reception of the NTSC broadcast is possible in step S17, the process returns to step S10 and the above operation is repeated until the NTSC broadcast stops. With this operation, even if the NTSC broadcast cannot be received accidentally due to a broadcast accident or the like, and the function related to the NTSC broadcast is invalidated, it is not erroneously determined that the NTSC broadcast is stopped. At the time of return, functions related to NTSC broadcasting can be validated and received.

  On the other hand, in step 18, it is determined whether or not a predetermined period has passed since the NTSC broadcast was not found. The predetermined period here can be set to a period during which it can be determined that the NTSC broadcast has stopped reliably, for example, three days in consideration of a case where the NTSC broadcast cannot be received by accident due to a broadcast accident or the like.

  If it is determined in step S18 that the predetermined period has not elapsed, the process returns to step S14, and the NTSC broadcast channel scan is repeated. On the other hand, if the predetermined time has elapsed in step S18, it is determined that the NTSC broadcast has stopped reliably, and this operation is terminated, and no NTSC broadcast channel scan is performed in the future.

  In the flowchart of FIG. 2, the processing for invalidating the function related to NTSC broadcasting in step S13 may be performed after step S18 instead of the position shown in FIG. By doing so, it is possible to invalidate the functions related to the NTSC broadcast after confirming that the NTSC broadcast has stopped reliably. In this case, the process of step S17 becomes unnecessary.

  As described above, according to the DVD-integrated television 10, the function related to the analog broadcast can be invalidated after the analog broadcast is stopped, and the function related to the analog broadcast can be surely used until the analog broadcast is stopped.

  The digital / analog broadcast receiving apparatus and the digital / analog broadcast recording / playback apparatus of the present invention can be used for a television receiver, a DVD apparatus, an HDD apparatus, a video apparatus, a composite apparatus thereof, etc. in addition to a DVD integrated television. .

It is a block diagram which shows the structure of the DVD integrated television of this invention. It is a flowchart which shows operation | movement of the DVD integrated television of this invention for responding to the stop of NTSC broadcasting.

Explanation of symbols

10 DVD-integrated television 12 tuner 16 DVD recording / playback unit

Claims (6)

In a digital / analog broadcast recording / playback apparatus including a tuner that receives both analog broadcast and digital broadcast, and a DVD recording / playback unit that records and plays back the received broadcast on a DVD,
When the analog broadcast channel scan is performed at the first predetermined time interval and the analog broadcast is not found, the analog broadcast channel reception function and the analog broadcast channel recording function are disabled, and the analog broadcast channel is skipped at the time of channel selection.
After the analog broadcast channel reception function and the analog broadcast channel recording function are disabled, the analog broadcast channel scan is performed at a second predetermined time interval, and if an analog broadcast is found, the analog broadcast channel reception function and analog Digital / analog broadcast recording / playback, which enables the broadcast channel recording function to select an analog broadcast channel at the time of tuning, and stops analog broadcast channel scanning when no analog broadcast is found for a specified period of time apparatus. In a digital / analog broadcast receiver that can receive both analog broadcast and digital broadcast,
When the analog broadcast is scanned at the first predetermined time interval and the analog broadcast is not found, the function related to the analog broadcast is disabled,
After the analog broadcast function is disabled, the analog broadcast channel scan is performed at a second predetermined time interval, and when the analog broadcast is found, the analog broadcast function is enabled. Analog broadcast receiver.   After disabling the function related to the analog broadcast, the analog broadcast channel scan is performed at the second predetermined time interval, and if no analog broadcast is found for a predetermined period, the analog broadcast channel scan is stopped. The digital / analog broadcast receiving apparatus according to claim 2.   4. The digital / analog broadcast reception according to claim 2, wherein the function related to the analog broadcast is a reception function of an analog broadcast channel, and when the function is disabled, the analog broadcast channel is skipped at the time of channel selection. apparatus.   A digital / analog broadcast recording apparatus comprising: the digital / analog broadcast receiving apparatus according to any one of claims 2 to 4; and a recording / playback unit that records and reproduces a broadcast received by the digital / analog broadcast receiving apparatus on a recording medium. Playback device.   6. The digital / analog broadcast recording / reproducing apparatus according to claim 5, wherein the function related to the analog broadcast is an analog broadcast channel recording function.

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