JP5530119B2 - Broadcast receiver - Google Patents

Description

  The present invention relates to a broadcast receiving apparatus that can receive broadcast waves of a plurality of broadcast formats.

In recent television broadcasting, BS digital broadcasting, CS digital broadcasting, terrestrial digital broadcasting, and broadcasting formats have been diversified, and there are many channels in each broadcasting format.
In such a receiving apparatus capable of receiving broadcast waves of a plurality of broadcast formats, when a user selects a channel, first, the user selects a broadcast format (BS digital broadcast, CS digital broadcast, terrestrial digital broadcast). Press the button of the broadcast format that broadcasts the channel from the buttons. Next, the user selects a target channel in the broadcast format using a direct channel selection button or an up / down channel selection button.

FIG. 4 is a diagram showing a schematic configuration of a conventional fixed television receiver 102 including a terrestrial digital tuner 104, a BS digital tuner 105, and a CS digital tuner 106 (see Patent Document 1).
In the fixed television receiving apparatus 102 shown in FIG. 4, for example, when the user wants to watch Ch3 (channel 3) of CS digital broadcasting while watching Ch1 (channel 1) of BS digital broadcasting, the user uses a remote control. At 103, a CS button for selecting CS digital broadcasting is pressed, and then a channel selection button of Ch3 is pressed.
When the CS button of the remote controller 103 is pressed, a signal for selecting CS digital broadcasting is output to the microcomputer 112 via the remote controller light receiving unit 111, and the switch SW (switch) unit 107 is controlled by the microcomputer 112 to control the CS digital tuner 106. And the CS digital tuner 106 starts tuning. At this time, the CS digital tuner 106 operates to receive Ch1, which is the last channel. Thereafter, when a channel selection button of Ch3 is pressed on the remote controller 103, a signal for selecting Ch3 is output to the microcomputer 112, and the CS digital tuner 106 operates to receive Ch3 under the control of the microcomputer 112. Then, the decoder 108 decodes the digital broadcast, the video / audio processing unit 109 adds video and audio processing to the decoded data, and outputs the video signal and audio signal to the video / audio output unit 110.

  BS digital broadcasting, CS digital broadcasting, and terrestrial digital broadcasting are mainly television broadcasts for fixed television receivers. However, one-segment broadcasting (1 for mobile phones and mobile terminals) can also be used for television broadcasts for mobile phone terminals. There are multiple broadcasting formats such as segment partial reception service), MediaFLO (registered trademark), ISDB-Tmm (Integrated Services Digital Broadcasting-Terrestrial for mobile multimedia), and reception of these multiple broadcasting formats is supported by one mobile phone terminal Possible configurations are possible.

JP 2006-246371 A

  Incidentally, in general, in order to receive a digital broadcast, it is necessary to change the broadcast format and reception channel, process the received transport stream, decode (decode) the MPEG signal, and the like. For this reason, an apparatus that receives a digital broadcast switches the broadcast format and channel to be viewed, and it takes time to display a stable received image. Is impaired and the user feels stressed.

Furthermore, when selecting (selecting) a channel across broadcast formats, it takes more time to view the target channel than when selecting a channel within the same broadcast format. There is a problem that it ends up. As explained in the background art, when a channel is selected across broadcasting formats, if the target broadcasting format is selected and the channel is not switched to the target broadcasting format, the channel selection in the broadcasting format is not selected. Due to the inability to do so.
When a channel within the same broadcast format is selected, the target channel is decoded immediately after the target channel is selected (selected). On the other hand, when a channel is selected across broadcast formats, the broadcast channel is selected, and after switching to the broadcast format, the target channel is selected, so that the target channel is finally decoded.
In this way, when selecting a channel across broadcast formats, channel selection within the broadcast format is performed until the channel is switched to the target broadcast format, compared to selecting a channel within the same broadcast format. Since it is not accepted, it takes a lot of time to switch to the target channel, which puts stress on the user.

  The present invention has been made in view of such problems, and an object of the present invention is to shorten the time required for viewing a target channel when a channel is selected across broadcasting formats. It is another object of the present invention to provide a broadcast receiving apparatus that can reduce the stress on the user.

In order to achieve the above object, a broadcast receiving apparatus of the present invention includes a plurality of broadcast receiving units that receive and decode a broadcast wave corresponding to each of a plurality of broadcast wave forms, and a channel of the broadcast wave . When an operation unit for selecting a channel number and a broadcast format and a channel number different from the channel number of the channel currently selected by the operation unit are selected, each of the plurality of broadcast reception units is selected. And a control unit that controls to receive and decode a broadcast wave of a channel having the same channel number as the channel number .

When the broadcast format is selected by the operation unit after the channel number is selected, the control unit reproduces the decoded data of the broadcast receiving unit corresponding to the broadcast wave of the selected broadcast format. Preferably, the control unit controls to stop reception and decoding of the broadcast receiving unit corresponding to a broadcast wave of a broadcast format not selected by the operation unit, and If the broadcast format is not selected by the operation unit within a predetermined time after the channel number is selected, the control unit receives and decodes the broadcast reception unit corresponding to a broadcast wave of a broadcast format that is not viewed It is preferable to control so as to stop.

  In the present invention, when a channel is selected across broadcast formats, the channel can be operated in the order in which the target broadcast format is selected after the channel within the target broadcast format is first selected. As a result, channel selection is faster than selecting a desired broadcast format and then operating in the order in which channels in that broadcast format are selected, thereby reducing stress on the user. it can.

It is a figure which shows schematic structure of the broadcast receiver of this invention. It is a figure which shows the operation | movement flow of the broadcast receiver at the time of channel switching. It is a figure explaining the switching method of the conventional method and this invention. It is a figure which shows schematic structure of the conventional fixed television receiver.

  Embodiments of the present invention will be described with reference to the drawings. The broadcast receiving apparatus of the present invention is, for example, a fixed television receiving apparatus or a mobile phone terminal that can receive broadcast waves of a plurality of broadcast formats. FIG. 1 shows a schematic configuration of a broadcast receiving apparatus of the present invention. The broadcast receiving apparatus shown in FIG. 1 includes a first broadcast wave receiving unit 10 for receiving and processing a first broadcast wave (first broadcast wave), and a second broadcast wave (second broadcast). The second broadcast wave receiving unit 20, the broadcast switching unit 30, the control unit 40, the memory 50, the operation unit 60, the timer unit 70, the video / audio processing unit 80, and the video / audio output unit 90. Is provided.

  The first broadcast wave receiver 10 includes a first broadcast wave antenna 11, a first broadcast wave tuner 12, a first broadcast wave demodulator 13, and a first broadcast wave decoder 14. The first broadcast wave tuner 12 selects the first broadcast wave received by the first broadcast wave antenna 11 and outputs the selected first broadcast wave to the first broadcast wave demodulation unit 13. A start command for the first broadcast wave tuner 12 and channel selection information for selecting a desired broadcast station are provided from the control unit 40. The first broadcast wave demodulator 13 demodulates the broadcast wave received from the first broadcast wave tuner 12, extracts a bit stream, and outputs the bit stream to the first broadcast wave decoder 14. The first broadcast wave decoding unit 14 decodes the bit stream given from the first broadcast wave demodulation unit 13 and outputs the decoded bit stream to the broadcast switching unit 19.

The second broadcast wave receiving unit 20 has the same configuration as that of the first broadcast wave receiving unit 10, and includes a second broadcast wave antenna 21, a second broadcast wave tuner 22, a second broadcast wave demodulating unit 23, and a second broadcast wave decoding unit. It consists of 24 components. The operation of each component is the same as that of the first broadcast wave receiver 10.
Note that the first broadcast wave and the second broadcast wave are broadcast waves of different broadcast formats. For example, if the broadcast receiver is a fixed television receiver, terrestrial digital broadcast and BS digital broadcast, terrestrial digital broadcast and CS digital broadcast are used. If the broadcast receiving apparatus is a mobile phone terminal, broadcast waves such as One Seg and MediaFLO, One Seg and ISDB-Tmm, etc.

  The broadcast switching unit 30 is selected by the user via the operation unit 60 from the decoded data of the first broadcast wave and the second broadcast wave output from the first broadcast wave receiver 10 and the second broadcast wave receiver 20. A switch function for outputting only broadcast format data to the video / audio processing unit 80 is provided.

  The memory 50 has a storage area for storing a broadcast format that was viewed before switching channels and / or broadcast formats and a predetermined time after channel selection. In FIG. 1, the entire storage device in the broadcast receiving device is shown as a single memory 50. That is, the video memory and buffer memory at the time of viewing and the working memory of the control unit 40 are representatively shown as the memory 50.

  The operation unit 60 has at least means for selecting a channel and a broadcast format, and is used for selecting a channel to be viewed and a broadcast format. Information on the channel and broadcast format selected by the user is output to the control unit 40. The selection of the channel and the broadcast format may be performed using a selection button provided on the operation unit 60, or may be performed by operating an external device such as a remote controller.

  The timer unit 70 counts a predetermined time after channel selection in order to determine whether or not a broadcast format is selected within a predetermined time after selecting a channel when switching between channels and / or broadcast formats. The predetermined time is, for example, data sent from the video / audio output unit 90 until a certain video or audio is output (reproduced) after the channel is selected to the first broadcast wave decoding unit 14 and the second broadcast wave decoding unit 24. The time until the first decoding is completed, or the time until channel selection is completed in the first broadcast wave tuner unit 12 and the second broadcast wave tuner unit 22 after the channel is selected. The predetermined time is preferably 0.5 to 2 seconds, and may be arbitrarily set by the user. The predetermined time after channel selection may be stored in the timer unit 70.

  The video / audio processing unit 80 adds processing related to video and audio to the decoded data of the first broadcast wave or the second broadcast wave output from the broadcast switching unit 30 and outputs the result to the video / audio output unit 90. The processing related to video and audio includes, for example, image quality adjustment and volume adjustment. These adjustments are performed automatically or by the user operating the operation unit 60 and giving instructions. The video / audio output unit 90 outputs video and / or audio of the selected broadcast wave.

  The control unit 40 controls the first broadcast wave receiving unit 10, the second broadcast wave receiving unit 20, the broadcast switching unit 30, the video / audio processing based on the channel and broadcast format information selected by the user by operating the operation unit 60. The unit 80 is controlled so that the video and / or audio of the selected channel or broadcast format is output to the video / audio output unit 90. Also, when switching between channels and / or broadcast formats, after selecting a channel, it is determined whether or not a broadcast format has been selected within a predetermined time based on the count information of the timer unit 70, and broadcast switching is performed based on the result. The broadcast format to be output is determined by controlling the unit 30.

The broadcast receiver shown in FIG. 1 includes two broadcast wave receivers that can receive broadcast waves of different broadcast formats. However, the broadcast receiver includes two or more broadcast wave receivers and supports two or more broadcast formats. The structure to do may be sufficient.
The broadcast receiving apparatus shown in FIG. 1 includes a video / audio processing unit 80 and a video / audio output unit 90 and has a function of outputting received video and / or audio. The video / audio output unit 90 may be provided in an external connection device so that only reception and decoding of broadcast waves, or reception and decoding of broadcast waves, and adjustment of video and / or audio are performed.
In the broadcast receiving apparatus shown in FIG. 1, the output destination of the video / audio processing unit 80 is the video / audio output unit 90, and the video / audio output unit 90 is a screen or speaker that outputs video and / or audio. The output destination of the video / audio processing unit 80 may be a built-in or removable storage device for recording.

  FIG. 2 is a diagram showing an operation flow of the broadcast receiving apparatus at the time of channel switching. Note that at the start of the flow in FIG. 2, it is assumed that an application that receives and outputs a broadcast wave has already been started and a certain channel is being viewed.

  When the user selects a channel to be viewed next by operating the operation unit 60 (step S01), the control unit 40 acquires information on the channel selected by the user from the operation unit 60 and broadcasts the channel. The first broadcast wave receiving unit 10 and the second broadcast wave receiving unit 20 are controlled so as to select, receive, demodulate, and decode the wave (step S02). Data decoded by the first broadcast wave receiving unit 10 and the second broadcast wave receiving unit 20 is output to the broadcast switching unit 30.

  When the control unit 40 acquires information on the channel selected by the user from the operation unit 60, the control unit 40 sets a predetermined time in the timer unit 70 so as to count the predetermined time stored in the memory 50 in advance. The time count information is acquired from the unit 70, and it is determined whether the broadcast format is selected within a predetermined time after the channel is selected in step S01 (step S03).

When the broadcast format of the channel that the user wants to view is selected within a predetermined time by operating the operation unit 60 (in the case of YES), the control unit 40 displays information on the broadcast format selected by the user from the operation unit 60. At the same time, the selected broadcast format is stored in the memory 50 (step S04). If the broadcast format has already been stored, the broadcast format is overwritten.
The control unit 40 receives only the decoded data corresponding to the broadcast format selected by the user in step S03 from the decoded data output from the first broadcast wave receiving unit 10 and the second broadcast wave receiving unit 20, and the video / audio processing unit 80. The broadcast switching unit 30 is controlled to output to (step S05). At the same time, the broadcast wave receiving unit corresponding to the broadcast format not selected in step S03 is controlled to stop channel selection (reception of the selected channel), demodulation, and decoding. The decoded data output to the video / audio processing unit 80 is output (reproduced) by the video / audio output unit 90.

In step S03, if a broadcast format is not selected within a predetermined time (in the case of NO), the control unit 40 stores information on the broadcast format that was viewed before the channel was selected in step S01 from the memory 50. Read (step S06).
The control unit 40 controls the broadcast switching unit 30 to output only the decoded data in the broadcast format corresponding to the information read from the memory 50 in step S06 to the video / audio processing unit 80 (step S07). At the same time, the broadcast wave receiving unit corresponding to the broadcast format that is not output to the video / audio processing unit 80 (broadcast format that is not viewed) is controlled to stop channel selection, demodulation, and decoding.

  The video / audio processing unit 80 performs processing related to video and / or audio on the decoded data output from the broadcast switching unit 30, and provides the video / audio output unit 90 to output video and / or audio (step). S08).

Note that in step S02, an image, audio, and video indicating that the channel selected by the user for each broadcast format is being received may be output to the video / audio output unit 90.
In step S05 and step S07, the selection, demodulation, and decoding of broadcast waves in the broadcast format that are not output to the video / audio processing unit 80 are stopped, and the broadcast wave tuner, broadcast wave demodulation unit, The power of the wave decoding unit may be turned off. When the power is turned off, when selecting, demodulating, and decoding the channel selected by the user in step S02, the control unit 40 transmits a broadcast wave tuner and a broadcast wave corresponding to the broadcast format whose power is turned off. Control to turn on the power of the demodulator and broadcast wave decoder is performed.

  3 shows a conventional method (channel selection after selecting a broadcasting format) when switching from MediaFLO Ch5 (channel 5) to OneSeg Ch1 (channel 1) in a mobile phone terminal capable of receiving 1Seg and MediaFLO. And a switching operation of the present invention.

  In the conventional method, when watching MediaFLO Ch5, when switching to a one-seg broadcast format is started at time t0, the one-seg receiving unit is activated and the last channel viewed in one-seg If (last channel) is Ch5, reception of the one-segment Ch5 watched last is started. When Ch1 is selected at time t1, reception of one-segment Ch1 is started, and video and audio of one-segment Ch1 is output at time t4.

  On the other hand, in the present invention, if Ch1 is selected at time t0 while viewing Ch5 of MediaFLO, the receiving unit of 1Seg and MediaFLO is activated to receive Ch1 of 1Seg and Ch1 of MediaFLO. To start. When one seg is selected at time t1 within a predetermined time from time t0 to time t2, one seg Ch1 video and audio is output at time t3. The reception of Ch1 of MediaFLO is stopped at time t1 when one segment is selected.

  As is apparent from this figure, in the conventional method, one-segment Ch1 video / audio is output from time t4, whereas in the present invention, one-segment Ch1 video / audio is output from time t3 prior to time t4. . Therefore, in the present invention, it is possible to shorten the time from the channel switching operation until viewing becomes possible, as compared with the conventional method.

  As described above, in the present invention, when a user switches channels across broadcast formats, when a channel is first selected, the channels of each broadcast format are simultaneously received and decoded. Thereby, the decoding of the target channel is performed from the time when the channel is selected, and the decoding start timing of the target channel can be advanced. When a broadcast format is selected after the start of simultaneous reception and simultaneous decoding, reception and decoding of the selected broadcast format is continued, and decoded data is reproduced. As a result, the time from the channel switching operation to the time when viewing becomes possible is shortened, and the stress on the user can be reduced.

  In the above-described embodiment, the case where the present invention is applied to a broadcast receiving apparatus that can receive digital broadcast waves of a plurality of broadcast formats has been described. However, the present invention is not limited to this, and analog broadcasting The present invention can also be applied to a broadcast receiving apparatus that can receive broadcast waves of both digital broadcasting and digital broadcasting.

DESCRIPTION OF SYMBOLS 10 1st broadcast wave receiving part 11 1st broadcast wave antenna 12 1st broadcast wave tuner 13 1st broadcast wave demodulation part 14 1st broadcast wave decoding part 20 2nd broadcast wave receiving part 21 2nd broadcast wave antenna 22 2nd broadcast Wave tuner 23 Second broadcast wave demodulation unit 24 Third broadcast wave decoding unit 30 Broadcast switching unit 40 Control unit 50 Memory 60 Operation unit 70 Timer unit 80, 109 Video / audio processing unit 90, 110 Video / audio output unit 102 Fixed television receiver 103 Remote Control 104 Terrestrial Digital Tuner 105 BS Digital Tuner 106 CS Digital Tuner 107 Switching SW (Switch) Unit 108 Decoding Unit

Claims (4)

Corresponding to each of the broadcast waves of a plurality of broadcast formats, a plurality of broadcast receivers for receiving and decoding the broadcast waves,
An operation unit for selecting a channel number and a broadcast format of the broadcast wave channel;
When a channel number different from the channel number of the currently selected channel is selected by the operation unit, each of the plurality of broadcast receiving units receives a broadcast wave of a channel having the same channel number as the selected channel number. A control unit that controls to decode;
A broadcast receiving apparatus comprising: When the broadcast format is selected by the operation unit after the channel number is selected, the control unit reproduces the decoded data of the broadcast receiving unit corresponding to the broadcast wave of the selected broadcast format. The broadcast receiving apparatus according to claim 1, wherein the broadcast receiving apparatus is controlled as follows.   The broadcast receiving apparatus according to claim 2, wherein the control unit performs control so as to stop reception and decoding of the broadcast receiving unit corresponding to a broadcast wave of a broadcast format not selected by the operation unit. If the broadcast format is not selected by the operation unit within a predetermined time after the channel number is selected, the control unit receives the broadcast reception unit corresponding to a broadcast wave of a broadcast format that is not viewed and 4. The broadcast receiving apparatus according to claim 1, wherein the broadcast receiving apparatus is controlled to stop decoding.

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