JP2009260568A - Receiver and reception method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To properly switch to receive broadcasting signals transmitted in which hierarchy in a receiver for receiving hierarchically transmitted broadcasting signals. <P>SOLUTION: The receiver for receiving the hierarchically transmitted broadcasting signals includes: category specifying means (104, 113) for specifying the category of broadcasting contents relating to the broadcasting signals to be received; switching means (107, 108) for switching the output of the broadcasting contents based on the broadcasting signals relating to which hierarchy is to be performed; and control means (111, 112 and 114) for controlling the switching means on the basis of the category specified by the category specifying means. Further, the switching means is controlled on the basis of the signal quality of the reception signals. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a receiving apparatus that receives a broadcast signal transmitted hierarchically and a receiving method in the receiving apparatus.

  Conventionally, as a receiving device for digital broadcasting, a signal quality value obtained by performing transmission path demodulation on a received broadcast signal is compared with a predetermined threshold, and based on the result, the broadcast signal of either a weak layer or a strong layer Is known to switch whether to receive (see, for example, Patent Document 1).

  FIG. 3 is a block diagram showing a configuration of a conventional digital broadcast receiving apparatus disclosed in the document. As shown in the figure, this apparatus includes an antenna unit 101 that receives a broadcast signal, a channel selection unit 102 that selects a desired channel from the received broadcast signal, and a demodulation process and an error for the selected broadcast signal. A transmission path demodulation unit 103 that performs correction processing and acquires a signal quality value Q indicating the signal quality of the broadcast signal, a demultiplexing unit 104 that demultiplexes the broadcast signal subjected to demodulation processing and error correction processing, and demultiplexed A weak layer decoding unit 105 that decodes the weak layer signal, a strong layer decoding unit 106 that decodes the demultiplexed strong layer signal, and selects and outputs at least one of the decoded weak layer video signal and strong layer video signal The video switching unit 107, the audio switching unit 108 that selects and outputs at least one of the decoded weak layer audio signal and strong layer audio signal, and the weak that the video switching unit 107 outputs A video display unit 109 that displays a layer video signal or a strong layer video signal, an audio output unit 110 that outputs a weak layer audio signal or a strong layer audio signal output from the audio switching unit 108, a video threshold value for determining a reception layer, and A threshold setting unit 111 that sets an audio threshold, and a switching control unit 112 that controls the video switching unit 107 and the audio switching unit 108 are provided.

  The switching control unit 112 compares the signal quality value Q acquired by the transmission path demodulation unit 103 with the video threshold set by the threshold setting unit 111 and instructs the video switching unit 107 to select a hierarchy to be selected. . The switching control unit 112 also compares the signal quality value Q acquired by the transmission path demodulation unit 103 with the audio threshold set by the threshold setting unit 111, and determines the hierarchy to be selected for the audio switching unit 108. Instruct. At this time, the switching control unit 112 selects the weak hierarchical video signal when the signal quality value Q is larger than the video threshold, and selects the strong hierarchical video signal when the signal quality value Q is smaller than the video threshold. To instruct. Further, when the signal quality value Q is larger than the voice threshold value, the weak hierarchy voice signal is selected, and when the signal quality value Q is smaller than the voice threshold value, the strong hierarchy voice signal is selected.

JP 2007-174169 A

  In the above-described prior art, when the broadcast signal transmitted in the weak hierarchy is received, if the signal quality value Q of the broadcast signal falls below the threshold value, the reception is switched to the broadcast signal in the strong hierarchy. This point is not inconvenient when receiving a program that can be sufficiently viewed by a broadcast signal of a strong hierarchy, such as a news program. However, in the case of receiving sports such as sports that are meaningless unless viewed in the weak hierarchy, it is inconvenient to switch to reception in the strong hierarchy just because the signal quality is reduced.

  In view of the problems of the prior art, the object of the present invention is to more appropriately switch which layer receives a broadcast signal transmitted in a receiving device that receives the layered broadcast signal. Is to be able to do.

  In order to achieve this object, a receiving apparatus according to the first invention is a receiving apparatus for receiving a broadcast signal transmitted hierarchically, and a genre specifying means for specifying a genre of broadcast content related to the received broadcast signal; A switching unit that switches whether to output broadcast content based on a broadcast signal according to which level, and a control unit that controls the switching unit based on a genre specified by the genre specifying unit. .

  Here, two-layer transmission, three-layer transmission, and multiple layer transmission correspond to the layer transmission. Examples of broadcast content genres include news, sports, and dramas. As output of broadcast content, for example, video output and audio output are applicable. In this case, the switching unit may switch the video output and the audio output separately based on the genre specified by the genre specifying unit.

  In this configuration, when receiving a broadcast signal transmitted hierarchically, the genre specifying means specifies the genre of the broadcast content based on the received broadcast signal. Then, based on the identified genre, the control means switches the broadcast content based on the broadcast signal related to which layer is to be output by the switching means. Thereby, according to the genre of the broadcast to receive, the broadcast content based on the broadcast signal concerning the hierarchy suitable for the broadcast of the genre can be output.

  According to a second aspect of the present invention, there is provided a receiving apparatus according to the first aspect, further comprising quality acquisition means for acquiring signal quality of a received broadcast signal, wherein the control means acquires control of the switching means by the quality acquisition means. It is performed based on signal quality.

  In the second invention, the receiving device according to a third invention is the signal for determining whether to output broadcast content based on a broadcast signal according to which layer according to the signal quality acquired by the quality acquisition means. A threshold specifying means for specifying a threshold relating to quality based on a genre specified by the genre specifying means, wherein the control means controls the switching means; the threshold specified by the threshold specifying means; and the quality output means It is based on the comparison result with the signal quality to acquire, It is characterized by the above-mentioned.

  According to a fourth aspect of the present invention, there is provided a receiving apparatus according to the third aspect, further comprising: a user setting unit that accepts a threshold setting relating to the signal quality for each genre of the broadcast content, wherein the threshold specifying unit specifies the threshold. The determination is performed based on a genre specified by the specifying unit and a threshold for each genre set by the user setting unit.

  A receiving apparatus according to a fifth aspect of the present invention includes a speed detection unit that detects and outputs a moving speed of the apparatus according to any one of the first to fourth aspects, and the control unit controls the switching unit. It is performed based on the moving speed detected by the speed detecting means.

  A receiving device according to a sixth aspect of the present invention is the receiving device according to any one of the first to fifth aspects, further comprising a region detecting unit that detects a region where the device exists, wherein the control unit controls the switching unit. It is performed based on the area which a detection means detects.

  A receiving method according to a seventh aspect of the present invention is a receiving method in a receiving apparatus that receives a broadcast signal transmitted hierarchically, wherein the genre specifying means specifies a genre of broadcast content related to the received broadcast signal, and A switching step in which the switching means outputs broadcast content based on a broadcast signal related to which level, and a control in which the control means controls the switching means based on the genre specified in the genre specifying step. And a process.

  According to the present invention, based on the genre specified for the broadcast content to be received, the broadcast content output is switched based on the broadcast signal according to which layer, so according to the genre of the broadcast content to be received, Broadcast content can be output based on a broadcast signal related to a hierarchy suitable for the broadcast content of the genre.

  FIG. 1 is a block diagram showing a configuration of a receiving apparatus according to an embodiment of the present invention. As shown in the figure, this receiving apparatus includes an antenna unit 101 that receives a broadcast signal, a channel selection unit 102 that extracts an intermediate frequency signal of a channel set by a user from the received broadcast signal, and an intermediate unit from the channel selection unit 102. The frequency signal is converted into a TS (transport stream) packet by performing demodulation processing and error correction processing on the frequency signal, and the transmission path demodulation unit 103 that acquires the signal quality value Q of the broadcast signal, Demultiplexing unit 104 that separates data (audio data and video data), strong hierarchical AV data and genre data, weak hierarchical decoding unit 105 that decodes the demultiplexed weak hierarchical AV data, and demultiplexed strong hierarchical AV data Strong hierarchy decoding section 106 for decoding, at least one of decoded weak hierarchy video data and strong hierarchy video data The video switching unit 107 that selects and outputs, the audio switching unit 108 that selects and outputs at least one of the decoded weak hierarchical audio data and strong hierarchical audio data, and the weak hierarchical video data output by the video switching unit 107 Alternatively, the video display unit 109 that displays the strong layer video data, the weak layer audio data output from the audio switching unit 108 or the audio output unit 110 that outputs the strong layer audio data, based on the video data and audio data of any reception layer A threshold setting unit 111 that sets a video threshold and an audio threshold for determining whether to perform output, and a switching control unit 112 that controls the video switching unit 107 and the audio switching unit 108 are provided.

  The receiving device further includes a genre specifying unit 113 that specifies the genre of the broadcast content being received based on the genre data separated by the demultiplexing unit 104, and a genre setting unit that accepts video threshold and audio threshold settings for each genre by the user. 114. For each genre of broadcast content, the genre setting unit 114 fixes the reception hierarchy to the strong hierarchy or the weak hierarchy for each of the video data and the audio data, or switches the reception by the strong hierarchy and the weak hierarchy. Accepts the setting of a threshold value for the signal quality value Q, which is a standard for the case. The threshold setting unit 111 is based on the genre specified by the genre specifying unit 113 and the set value for each genre in the genre setting unit 114, and the video threshold and the audio threshold used for determining in which layer video and audio are received. Set. Note that broadcast signals transmitted in the strong hierarchy and the weak hierarchy correspond to broadcast signals by 1-segment broadcasting and 12-segment broadcasting in terrestrial digital broadcasting, for example.

  In this configuration, when a radio wave received by the antenna 101 is input to the channel selection unit 102, the channel selection unit 102 extracts an intermediate frequency signal of a channel set by the user based on the radio wave. The intermediate frequency signal is converted into a TS packet by the transmission line demodulator 103, and further demultiplexed by the demultiplexer 104 into weak hierarchical AV data, strong hierarchical AV data, and genre data. At that time, the transmission path demodulation unit 103 outputs the signal quality value Q of the broadcast signal in the channel. The separated weak hierarchical AV data and strong hierarchical AV data are decoded by the weak hierarchical decoding unit 105 and the strong hierarchical decoding unit 106, respectively, and after passing through the video switching unit 107 and the audio switching unit 108, the video display unit 109 and the audio output unit 110. Is output at.

  During this time, based on the genre of the broadcast content being received specified by the genre specifying unit 113 based on the genre data separated in the demultiplexing unit 104, and the video threshold and audio threshold for each genre set in the genre setting unit 114. The threshold setting unit 111 sets a video threshold and an audio threshold for the broadcast being received. That is, if the genre setting unit 114 is set to fix the reception of video or audio to reception by a strong hierarchy in the genre setting unit 114, the threshold setting unit 111 receives the video threshold or audio. Set the threshold to maximum. When the setting for fixing reception by the weak layer is made, the video threshold value or the audio threshold value is set to the minimum. When the video threshold or audio threshold is set in the genre setting unit 114, the video threshold or audio threshold is set as the threshold.

  The switching control unit 112 compares the video threshold value and the audio threshold value set by the threshold value setting unit 111 with the signal quality value Q from the transmission path demodulation unit 103, and if the signal quality value Q is equal to or higher than the video threshold value, the weak layer The video switching unit 107 is controlled so that the video signal from the decoding unit 105 is output to the video display unit 109. If the signal quality value Q is not equal to or higher than the video threshold value, the video switching unit 107 is controlled so that the video signal from the strong hierarchy decoding unit 106 is output to the video display unit 109. If the signal quality value Q is equal to or higher than the audio threshold, the audio switching unit 108 is controlled so that the audio signal from the weak hierarchy decoding unit 105 is output to the audio output unit 110. If the signal quality value Q is not equal to or higher than the audio threshold, the audio switching unit 108 is controlled so that the audio signal from the strong hierarchy decoding unit 106 is output to the audio output unit 110.

  Therefore, in the genre setting unit 114, the user fixes the reception of video and audio to reception by the strong hierarchy or reception by the weak hierarchy, or sets the video threshold or audio threshold appropriately for each genre. Thus, according to the setting, the broadcast content can be viewed while appropriately switching the reception of the weak layer or the strong layer according to the genre of the broadcast content being received and the signal quality value Q.

  Content by television broadcasting can be divided into two types: those in which necessary information can be obtained by viewing on a fine screen and those in which necessary information can be obtained without using a fine screen. In particular, in a reception environment in a moving body such as a vehicle, normal reception is often difficult due to multipath, fading, antenna position, and the like. At this time, according to the present embodiment, for each genre, it is possible to perform setting for switching reception by the weak layer and strong layer and setting a threshold value for causing such switching. It is possible to obtain video and audio in an appropriate weak hierarchy or strong hierarchy according to the genre.

  For example, when viewing news, sufficient information can be obtained even by reception on the strong hierarchy (one segment), so the genre setting unit 114 sets the news genre to always receive on the strong hierarchy. Thus, the coverage area of the news program can be broadened. On the other hand, when watching a sports program, the momentary momentary movement is important, and it is necessary to watch on a fine screen. Therefore, by setting to be fixed to reception by the weak hierarchy (12 segments), it is possible to always perform viewing on a fine screen.

  FIG. 2 is a block diagram showing a configuration of a receiving apparatus according to another embodiment of the present invention. As shown in the figure, the receiving device is provided with a user setting unit 115 in place of the genre setting unit 114 in the receiving device of FIG. 1 and a moving speed detecting unit 116 for detecting the moving speed of the receiving device. It has a configuration.

  As the moving speed detection unit 116, for example, when the receiving device is mounted on a vehicle, a unit that detects the moving speed based on a vehicle speed signal obtained from the vehicle can be used. Or what detects a moving speed based on the output of the GPS receiver which moves accompanying a receiver can be used. Moreover, what detects a moving speed based on the output of a vehicle speed pulse and a GPS receiver can be used. Moreover, when a pedestrian carries a receiver, what detects a moving speed based on the output of the pedometer which measures the number of steps of a pedestrian can be used.

  The user setting unit 115 is different depending on the genre of the received content specified by the genre specifying unit 113 and the moving speed of the receiving device detected by the receiving speed detecting unit 116, and the user sets the video threshold and audio threshold related to the signal quality value Q. Accept settings. If the signal quality value Q is equal to or greater than this threshold, reception is performed in the weak hierarchy, and if the signal quality value Q is not equal to or greater than this threshold, reception is performed in the strong hierarchy.

  For example, as shown in FIG. 4, the user sets the user setting unit 115 so that when a sports program is received, the reception is always performed at a strong hierarchy regardless of the moving speed of the receiving device and the signal quality value Q. In addition, the threshold for cases where the genre is sport and the movement speed is high and low can be set to 0 (zero). In addition, when receiving a news program, the threshold when the moving speed is fast is set to a and the threshold when the moving speed is low so that reception by the weak layer or the strong layer is performed in consideration of the moving speed and the signal quality value Q. Setting b can be performed. The threshold value may be set separately for the video threshold value and the audio threshold value.

  In this configuration, as in the embodiment of FIG. 1, weak hierarchical AV data and strong hierarchical AV data are obtained based on the received radio waves, and video display and audio output are performed based on the selected AV data. At the same time, a signal quality value Q is obtained from the transmission path demodulation unit 103, and the genre of the broadcast content being received is specified by the genre specifying unit 113. During this time, the threshold setting unit 111 sets a threshold relating to the signal quality value Q based on the setting content in the user setting unit 115, the genre specified by the genre specifying unit 113, and the moving speed detected by the moving speed detecting unit 116.

  For example, if the setting content in the user setting unit 115 is as shown in FIG. 4 described above, when the genre specified by the genre specifying unit 113 is news and the moving speed detected by the moving speed detecting unit 116 is high, The threshold value setting unit 111 outputs a threshold value a to the switching control unit 112. On the other hand, when the genre specified by the genre specifying unit 113 is a sport, the threshold setting unit 111 outputs a threshold 0 to the switching control unit 112 regardless of the moving speed detected by the moving speed detecting unit 116. .

  The switching control unit 112 compares the threshold value set in this way with the signal quality value Q from the transmission line demodulation unit 103. If the signal quality value Q is equal to or greater than the threshold value, the switching control unit 112 receives the signal from the weak layer decoding unit 105. The video switching unit 107 and the audio switching unit 108 are controlled so that display by the video display unit 109 and output by the audio output unit 110 are performed based on the AV data. If the signal quality value Q is not greater than or equal to the threshold value, the video switching unit 107 and the audio switching unit 108 are displayed so that the display by the video display unit 109 and the output by the audio output unit 110 are performed based on the AV data from the strong hierarchy decoding unit 106. To control.

  For example, when the receiving apparatus is moving at a high speed and receiving a news program, the threshold value a is output to the switching control unit 112 in the setting example of FIG. At this time, if the signal quality value Q from the transmission line demodulation unit 103 is equal to or higher than the threshold value a, the user can view news with fine video and audio based on the AV data from the weak layer decoding unit 105. it can. If the signal quality value Q is not equal to or greater than the threshold value a, viewing can be performed based on AV data from the strong hierarchy decoding unit 106. When a sports program is received, the threshold value 0 is output to the switching control unit 112 regardless of the moving speed of the receiving device. In this case, since the signal quality value Q from the transmission line demodulation unit 103 is always 0 or more, the user is always based on the AV data from the weak hierarchy decoding unit 106 as long as the user receives the sports program. Viewing with fine video and audio is possible.

  According to the present embodiment, based on the user setting by the user setting unit 115, depending on the moving speed of the receiving device detected by the moving speed detecting unit 116 and the genre of the received content specified by the genre specifying unit 113, the weak hierarchy or It is possible to control which of the strong layers is used for reception.

  The present invention is not limited to the above-described embodiment, and can be appropriately modified and implemented. For example, in the above description, the threshold setting unit 111 sets the threshold based on the genre of the broadcast program being received, the moving speed of the receiving device, and the threshold set for each genre and moving speed in the user setting unit 115. However, the subject of consideration is not limited to the genre or moving speed, and the region where the receiving device is located, the region where the receiving device is moving, the time zone during reception, etc. are considered individually or comprehensively. For example, the threshold value may be set by the user, or the threshold value may be set by the threshold value setting unit 111. At that time, the area where the receiving device exists or is moving can be known based on the current position information and map data obtained based on the received signal of the GPS receiver, for example. It can also be known by a navigation device equipped with these.

  In the above description, the case where hierarchical transmission is performed using the weak hierarchy and the strong hierarchy has been described. However, the number of hierarchies is not limited to this, and the hierarchy of the weak hierarchy, the middle hierarchy, and the strong hierarchy, or higher hierarchy may be used. It may be a number. In that case, the threshold value related to the signal quality value Q used for the determination for switching reception by each layer is a number corresponding to the number of layers.

  Further, in the above description, the threshold regarding the signal quality value Q used for the determination for switching reception by the strong layer and the weak layer is when switching from the strong layer to the weak layer, and conversely when switching from the weak layer to the strong layer. However, instead of this, different values may be used when switching from the strong hierarchy to the weak hierarchy and when switching from the weak hierarchy to the strong hierarchy. In this case, for example, switching between the strong hierarchy and the weak hierarchy can be made less likely to occur than when the same threshold value is used.

  Although not mentioned above, when setting the threshold for each genre in the genre setting unit 114 or the user setting unit 115 or setting the threshold for each genre and moving speed, there are several possible thresholds that can be set. May be prepared so that the user can select a desired one.

It is a block diagram which shows the structure of the receiver which concerns on one Embodiment of this invention. It is a block diagram which shows the structure of the receiver which concerns on another embodiment of this invention. It is a block diagram which shows the structure of the conventional digital broadcast receiver. It is a figure which shows the example of a setting in the user setting part of the apparatus of FIG.

Explanation of symbols

  101: antenna unit, 102: channel selection unit, 103: transmission line demodulation unit, 104: demultiplexing unit, 105: weak layer decoding unit, 106: strong layer decoding unit, 107: video switching unit, 108: audio switching unit, 109 : Video display unit, 110: audio output unit, 111: threshold setting unit, 112: switching control unit, 113: genre specifying unit, 114: genre setting unit, 115: user setting unit, 116: moving speed detection unit.

Claims (7)

A receiving device for receiving a broadcast signal transmitted hierarchically,
Genre specifying means for specifying the genre of broadcast content related to a broadcast signal to be received;
Switching means for switching whether to output broadcast content based on a broadcast signal according to which hierarchy;
And a control unit that controls the switching unit based on a genre specified by the genre specifying unit. Comprising quality acquisition means for acquiring the signal quality of the received broadcast signal;
The receiving apparatus according to claim 1, wherein the control unit is configured to control the switching unit based on a signal quality acquired by the quality acquiring unit. Based on the genre specified by the genre specifying means, a threshold relating to the signal quality for determining whether to output broadcast content based on the broadcast signal related to which layer according to the signal quality acquired by the quality acquisition means. A threshold specifying means for specifying
3. The control unit according to claim 2, wherein the control unit controls the switching unit based on a comparison result between a threshold value specified by the threshold value specifying unit and a signal quality acquired by the quality output unit. The receiving device described. User setting means for accepting setting of a threshold value for the signal quality for each genre of broadcast content,
The threshold value specifying unit is configured to specify the threshold value based on a genre specified by the genre specifying unit and a threshold value for each genre set by the user setting unit. Receiver. Comprising a speed detecting means for detecting the moving speed of the apparatus;
The receiving apparatus according to claim 1, wherein the control unit controls the switching unit based on a moving speed detected by the speed detecting unit. Comprising an area detecting means for detecting an area where the device is located;
The receiving apparatus according to claim 1, wherein the control unit controls the switching unit based on an area detected by the area detecting unit. A receiving method in a receiving apparatus for receiving a broadcast signal transmitted hierarchically,
A genre specifying step in which a genre specifying means specifies a genre of broadcast content related to a received broadcast signal;
A switching step in which the switching means switches the output of the broadcast content based on the broadcast signal according to which hierarchy; and
And a control unit that controls the switching unit based on the genre specified in the genre specifying step.

Images