JP2005072988A - Broadcast receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a broadcast receiver in which occurrence of blackout is suppressed at the time of switching the channel to simulcast broadcast. <P>SOLUTION: When a channel is switched to simulcast broadcast, the broadcast receiver 100 delivers a video/audio signal received from an analog signal processing section 107 to a display/output section 111 until a video/audio signal is received from a digital signal processing section 103, and delivers a video/audio signal from the digital signal processing section 103 to the display/output section 111 when a video/audio signal is received from the digital signal processing section 103. In other words, the broadcast receiver 100 delivers a video/audio signal received from the analog signal processing section 107 during a period after channel switching is requested before the channel is switched. Consequently, blackout is suppressed at the display/output section 111 at the time of switching the channel. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a broadcast receiver that receives and displays digital broadcasts and analog broadcasts.

  In the current digital broadcasting, when a viewer switches a television channel, it takes several seconds before switching to another channel. Usually, during such channel switching, nothing is output on the TV screen and blackout occurs, and there is a problem that smooth channel switching is not possible.

  The content of the following Patent Document 1, which is disclosed as a solution to the above-described problem in channel switching, will be briefly described below with reference to FIG.

  As shown in FIG. 9, on the broadcast station side, the guide program generating unit 3 combines reduced images of each program to create a program guide, and the packet multiplexing unit 4 multiplexes it with each program data and transmits it from the transmitting unit 5. To do.

  On the digital broadcast receiver side, the stream of the program designated for display is supplied to the storage unit 12, and the stream of the guide program is stored in the storage unit 17.

  At the time of display switching, the decoding unit 13 reads the stream from the storage unit 12 and outputs the decoded output of the program before switching until the I picture of the new program is stored in the storage unit 12. The decoding unit 18 decodes the stream of the program designated for display from the guide program stream from the storage unit 17. When the display program is switched, the selection unit 14 adds the image of the program before switching based on the output of the decoding unit 13 to the output of the decoding unit 18 until the decoding output of the new program is output from the decoding unit 13. A reduced image of a large program is displayed on a small screen.

JP 2001-346123 A.

  However, with the method described in Patent Document 1, the video output cannot be completely switched until the video of a new channel is decoded, and the conventional problem of blackout at the time of channel switching is completely eliminated. Has not been resolved.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a broadcast receiver in which occurrence of blackout is suppressed in switching to a channel of simulcast broadcasting.

  The broadcast receiver of the present invention includes a broadcast signal receiving means for receiving a digital broadcast signal and an analog broadcast signal, a broadcast information processing means for storing broadcast information in the broadcast signal, the broadcast signal as the digital broadcast signal, and the broadcast signal as described above. Broadcast signal distribution means for distributing to analog broadcast signals, digital signal processing means for converting the digital broadcast signals into video / audio signals, analog signal processing means for converting the analog broadcast signals into video / audio signals, and Switching means for selecting and outputting the video / audio signal output from either the digital signal processing means or the analog signal processing means, a channel switching signal received, the digital data processing means, and the analog data processing Switching signal for notifying the channel switching signal to the switching means and the switching means And a display output means for displaying and outputting the video / audio signal output from the switching means. The switching means switches the broadcast information when switching from the first channel to the second channel. When information that the second channel is simulcast broadcasting is stored in the processing means, a video / audio signal obtained by converting the digital broadcasting signal of the second channel from the digital signal processing means is output. Until this time, the video / audio signal obtained by converting the analog broadcast signal of the second channel from the analog signal processing means is output.

  In the conventional broadcast receiver, the display / output unit is blacked out during the period from the reception of the channel switching signal to the channel switching. However, in the broadcast receiver of the present invention, as described above, if the channel after switching is simulcast broadcasting, the video input from the analog signal processing means until the video / audio signal is input from the digital signal processing means. When the video / audio signal is output from the digital signal processing means, the video / audio signal is output from the digital signal processing means. That is, the video / audio signal input from the analog signal processing means is output during the period from the reception of the channel switching signal to the channel switching. For this reason, blackout is suppressed in the display output means at the time of channel switching.

  The switching means converts the digital broadcast signal of the second channel from the digital signal processing means from the video / audio signal obtained by converting the analog broadcast signal of the second channel from the analog signal processing means. It is possible to set the value of the output level of the audio signal serving as a reference for switching the output to the selected video / audio signal, and the output level of the audio signal obtained by converting the analog broadcast signal of the second channel is the above value. From the video / audio signal obtained by converting the analog broadcast signal of the second channel from the analog signal processing means, the digital broadcast signal of the second channel from the digital signal processing means is The output may be switched to the converted video / audio signal.

  The switching means includes the digital / digital signal from the video / audio signal obtained by converting the analog broadcast signal of the second channel from the analog signal processing means from the time when the channel switching signal processing means receives the channel switching signal. A configuration is also possible in which a standby time can be set until the time when the output is switched to the video / audio signal converted from the digital broadcast signal of the second channel from the signal processing means.

  The switching means converts the digital broadcast signal of the second channel from the digital signal processing means from the video / audio signal obtained by converting the analog broadcast signal of the second channel from the analog signal processing means. When the output is switched to the video / audio signal, the output level of the audio signal obtained by converting the analog broadcast signal of the second channel is lowered, and the audio signal obtained by converting the digital broadcast signal of the second channel The output level may be equivalent to the output level of the audio signal of the channel of the second analog broadcast before being lowered.

  The switching means converts the digital broadcast signal of the second channel from the digital signal processing means from the video / audio signal obtained by converting the analog broadcast signal of the second channel from the analog signal processing means. When the output is switched to the video / audio signal, the output of the audio signal converted from the analog broadcast signal of the second channel from the analog signal processing means may be stopped.

  The switching means converts the digital broadcast signal of the second channel from the digital signal processing means from the video / audio signal obtained by converting the analog broadcast signal of the second channel from the analog signal processing means. When the output is switched to the video / audio signal, the output level of the audio signal converted from the analog broadcast signal of the second channel from the analog signal processing means is faded in, and the analog of the second channel is The output level of the audio signal converted from the broadcast signal may be switched when it matches the output level of the audio signal converted from the digital broadcast signal of the second channel from the digital signal processing means.

  The switching means may be configured to switch from the first channel to the second channel in synchronization with a switching signal included in the broadcast signal.

  As the broadcast information, the audio signal obtained by converting the digital broadcast signal of the second channel is a 5.1 channel broadcast, or the digital broadcast signal of the second channel is converted into the broadcast signal information processing means. When the video signal is stored as a high-quality broadcast, the switching means outputs a video / audio signal obtained by converting the digital broadcast signal of the second channel from the digital signal processing means. At the same time, from the video / audio signal converted from the analog broadcast signal of the second channel from the analog signal processing means, the video / audio signal converted from the digital broadcast signal of the second channel from the digital signal processing means. The output may be switched to an audio signal.

  The broadcast receiver according to the present invention can suppress the occurrence of blackout in switching to a simulcast broadcast channel.

  Embodiments of the present invention will be described below with reference to the drawings. In the present specification, the term “connection” means “electrical connection” unless otherwise specified.

  FIG. 1 is a diagram illustrating a configuration of a broadcast receiver according to the present embodiment. Here, in the broadcast receiver of the present embodiment, a case is shown in which simulcast broadcasting is performed by switching from CH1 to CH2. However, this embodiment can be implemented if the channel after switching (that is, CH2) is simulcast broadcasting.

  The broadcast receiver 100 of the present embodiment includes a broadcast signal receiving unit 101, a broadcast signal distributing unit 102, a digital signal processing unit 103, an analog signal processing unit 107, a switching unit 110, a display / output unit 111, A channel switching signal processing unit 112 and a broadcast information processing unit 113 are provided.

  In particular, the digital signal processing unit 103 includes a tuner / demodulation unit 104, a demultiplexer unit 105, and an AV decoder unit 106, and the analog signal processing unit 107 includes a tuner / demodulation unit 108 and a decoder unit 109. I have.

  The broadcast signal receiving unit 101 is connected to the broadcast signal distributing unit 102.

  The broadcast signal distribution unit 102 is connected to the broadcast signal reception unit 101, the digital signal processing unit 103, and the analog signal processing unit 107.

  The digital signal processing unit 103 is connected to the broadcast signal distribution unit 102, the analog signal processing unit 107, the switching unit 110, the channel switching signal processing unit 112, and the broadcast information processing unit 113.

  The analog signal processing unit 107 is connected to the broadcast signal distribution unit 102, the digital signal processing unit 103, the switching unit 110, the channel switching signal processing unit 112, and the broadcast information processing unit 113.

  The switching unit 110 is connected to the digital signal processing unit 103, the analog signal processing unit 107, the channel switching signal processing unit 112, the broadcast information processing unit 113, and the display / output unit 111.

  The display / output unit 111 is connected to the switching unit 110.

  The tuner / demodulator 104 provided in the digital signal processor 103 is connected to the demultiplexer 105, and the demultiplexer 105 is connected to the AV decoder 106. The broadcast signal distribution unit 102, the analog signal processing unit 107, the channel switching signal processing unit 112, and the broadcast information processing unit 113 are actually connected to the tuner / demodulation unit 104. Furthermore, the switching unit 110 is actually connected to the AV decoder unit 106.

  A tuner / demodulator 108 provided in the analog signal processor 107 is connected to the decoder 109. The broadcast signal distribution unit 102, the digital signal processing unit 103, the switching unit 110, the channel switching signal processing unit 112, and the broadcast information processing unit 113 are actually connected to the tuner / demodulation unit 108. Furthermore, the switching unit 110 is actually connected to the decoder unit 109.

  Next, the operation of each part will be described.

  The broadcast signal receiving unit 101 receives a simulcast broadcast signal transmitted from a broadcast station.

  The broadcast signal distribution unit 102 distributes the received broadcast signal to the digital signal processing unit 103 and the analog signal processing unit 107.

  The tuner / demodulator 104 demodulates the signal input from the broadcast signal distributor 102 into a multiplexed digital video / audio signal.

  The demultiplexer unit 105 separates the multiplexed digital video / audio signal input from the tuner / demodulator unit 104.

  The AV decoder unit 106 decodes the digital video / audio signal input from the demultiplexer unit 105 into a signal (that is, a video / audio signal) that can be output to the display / output unit.

  The tuner / demodulator 108 demodulates the signal input from the broadcast signal distributor 102 into an analog video / audio signal.

  The decoder unit 109 decodes the analog video / audio signal input from the tuner / demodulator 108 into a signal (that is, a video / audio signal) that can be output to the display / output unit.

  The switching unit 110 selects the video / audio output signals input from the digital signal processing unit 103 and the analog signal processing unit 107 and outputs them to the display / output unit 111.

  The display / output unit 111 outputs the video / audio signal input from the switching unit 110.

  When the channel switching signal processing unit 112 receives the channel switching signal, the channel switching signal processing unit 112 sends the channel switching signal to the digital signal processing unit 103, the analog signal processing unit 107, and the switching unit 110.

  The broadcast information processing unit 113 stores the received broadcast information of the simulcast broadcast.

  Next, the operation of the broadcast receiver of this embodiment will be described.

  A broadcast signal of simulcast broadcast received by the broadcast signal receiving unit 101 is distributed to the digital signal processing unit 103 and the analog signal processing unit 107 by the broadcast signal distribution unit 102.

  The simulcast broadcast signal input from the broadcast signal distribution unit 102 to the digital signal processing unit 103 is digitally multiplexed by the tuner / demodulation unit 104 according to the information input from the channel switching signal processing unit 112 and the broadcast information processing unit 113. It is converted into a video / audio signal and sent to the demultiplexer unit 105. The multiplexed digital video / audio signals input from the tuner / demodulation unit 104 to the demultiplexer unit 105 are separated by the demultiplexer unit 105, and necessary digital video / audio signals are filtered from the separated digital video / audio signals. The Subsequently, the video / audio signal of the corresponding channel is input to the AV decoder unit 106 from the separated digital video / audio signal. The digital video / audio signal input from the demultiplexer unit 105 is decoded by the AV decoder unit 106 and output to the switching unit 110 as a video / audio signal.

  The broadcast signal of the simulcast broadcast input from the broadcast signal distribution unit 102 to the analog signal processing unit 107 is converted into an analog video / video signal according to information input from the channel switching signal processing unit 112 and the broadcast information processing unit 113 by the tuner / demodulation unit 108. It is converted into an audio signal and sent to the decoder unit 109. The analog video / audio signal input from the tuner / demodulator 108 to the decoder 109 is decoded by the decoder 109 and output to the switching unit 110 as a video / audio signal.

  Note that the video / audio signal of the corresponding channel sent from either or both of the digital signal processing unit 103 and the analog signal processing unit 107 is switched by the switching unit 110 and sent to the display / output unit 111 for output. Is done.

  The channel switching signal input to the channel switching signal processing unit 112 is a signal that is input when the channel is switched regardless of the reason, such as input from the user or program reservation, and at least the channel number after input. Service information is included.

  The broadcast information stored in the broadcast information processing unit 113 is broadcast information acquired after filtering by the demultiplexer unit 105 or broadcast information acquired from the network, and the acquisition means is not particularly limited, but analog broadcast or digital Channel information that is broadcast or simulcast is included.

  Next, the operation at the time of channel switching (channel CH1 → channel CH2) will be described.

  The channel switching signal processing unit 112 that has received the channel switching signal sends the received channel switching signal to the digital signal processing unit 103, the analog signal processing unit 107, and the switching unit 110 when channel switching is necessary.

  The digital signal processing unit 103 that has newly received the channel switching signal receives information from the broadcast information processing unit 113 and determines whether digital broadcasting is being performed on the new channel (CH2). If digital broadcasting is being performed, the digital video / audio signal of the corresponding channel is decoded and output to the switching unit 110.

  Similarly, the analog signal processing unit 107 that has newly received the channel switching signal receives information from the broadcast information processing unit 113, and determines whether analog broadcasting is being performed on the new channel (CH2). If analog broadcasting is being performed, the analog video / audio signal of the channel (CH 2) is decoded and output to the switching unit 110.

  The switching unit 110 that newly receives the channel switching signal receives information from the broadcast information processing unit 113, and determines whether the new channel (CH2) is only analog broadcast, only digital broadcast, or simulcast broadcast. to decide. Here, if only analog broadcasting is used, the video / audio signal input from the analog signal processing unit 107 is output to the display / output unit. In the case of only digital broadcasting, the video / audio signal input from the digital signal processing unit 103 is output to the display / output unit. In the case of simulcast broadcasting, the video / audio signal input from the analog signal processing unit 107 is output to the display / output unit 111 until the video / audio signal is input from the digital signal processing unit 103, and the digital signal processing unit When a video / audio signal is input from 103, the video / audio signal is output from the digital signal processing unit 103 to the display / output unit 111.

  In the following, the broadcast receiver according to this embodiment when switching to output the video / audio signal input from the digital signal processing unit 103 after outputting the video / audio signal input from the analog signal processing unit 107 will be described. The operation of 100 will be described with reference to FIG.

  FIG. 2 is a diagram showing channel switching in simulcast broadcasting. The time S shown in the figure is the time when the channel switching signal is input to the channel switching signal processing unit 112 (that is, the switching request), and the time T is the output of the switching unit 110 input from the analog signal processing unit 107. The time when the video / audio signal is switched to the video / audio signal input from the digital signal processing unit 103 is shown.

  In a conventional broadcast receiver, the display / output unit is blacked out during a period from a channel switching request (time S) to a channel switching point (time T). However, in the broadcast receiver 100 of this embodiment, as described above, if the channel after switching (that is, CH2) is simulcast broadcasting, an analog signal is output until the video / audio signal is input from the digital signal processing unit 103. When the video / audio signal input from the processing unit 107 is output to the display / output unit 111 and the video / audio signal is input from the digital signal processing unit 103, the video / audio signal is output from the digital signal processing unit 103. Is output to the display / output unit 111. That is, as shown in FIG. 2, in the broadcast receiver 100 of the present embodiment, the video / audio signal input from the analog signal processing unit 107 during the period from the switching request (time S) to the switching point (time T). Is output. Therefore, blackout is suppressed in the display / output unit 111 when the channel is switched.

  Note that when the channel (CH2) switches from analog broadcasting to digital broadcasting (time T), noise and data discontinuity may occur. Therefore, in order to suppress the occurrence of noise and data discontinuity, the switching method described below is preferably performed by the switching unit 110.

(Method 1)
Here, a method of switching from analog broadcasting to digital broadcasting with reference to the output level of the audio signal in the switching unit 110 will be described with reference to FIG.

  FIG. 3 is a diagram showing channel switching in simulcast broadcasting in the present method. A time T1 shown in FIG. 3 indicates a switching point, and a time T2 indicates a predetermined timeout point. A curve A in the figure shows an output level of an audio signal that falls below a predetermined switching reference level, and a curve B shows an audio signal that does not fall below the switching reference level until a predetermined timeout point. Indicates the output level.

  The switching unit 110 refers to the output level of the audio signal, and is set in advance when the output falls below a predetermined switching reference level (time T1 in FIG. 3) or from a switching request (time S). When the audio output level does not fall below the switching reference level by the time-out point (time T2 in FIG. 3), the video / audio signal input from the analog signal processing unit 107 is input from the digital signal processing unit 103. Switch the output to video / audio signal.

  As a result, when the audio signal is represented by a curve A, the video and audio output from the display / output unit 111 are analog at time T1 in FIG. 3, as shown in the column A in FIG. Switching from broadcasting to digital broadcasting. When the audio signal is represented by a curve B, the video and audio output from the display / output unit 111 are from analog broadcasting to digital broadcasting at time T2 in FIG. Switched to.

  Thus, in this method, switching from analog broadcasting to digital broadcasting is performed according to the output level of the audio signal. In particular, when the audio signal is represented by a curve A, as shown in the video / audio output data A in FIG. 3, switching from analog broadcasting to digital broadcasting is performed at time T1 when the output level of the audio signal is low. Therefore, when switching from analog broadcasting to digital broadcasting, the viewer is less likely to be aware of the seam of the audio switching.

(Method 2)
Here, a method of performing mute ON / OFF on an audio signal before and after switching from analog broadcasting to digital broadcasting and switching from analog broadcasting to digital broadcasting during the mute ON period will be described with reference to FIG. FIG. 4 is a diagram showing channel switching in simulcast broadcasting in the present method.

  When the video / audio signal is input from the digital signal processing unit 103 (that is, the time T3 when the input of the video / audio signal from the digital signal processing unit in FIG. After the output is stopped (mute ON), the video / audio input signal from the analog signal processing unit 107 is switched to the video / audio input signal from the digital signal processing unit 103 (time T4 in FIG. 4), and then the audio is input. The output is resumed (time T5 in FIG. 4: mute OFF).

  As a result, the video and audio output from the display / output unit 111 are switched from analog broadcasting to digital broadcasting at time T3 as shown in FIG.

  As described above, in this method, the audio output is stopped before and after the switching point from the analog broadcast to the digital broadcast, so that the viewer can switch without being particularly conscious of the voice switching joint.

(Method 3)
Here, a method for performing video / audio output when switching to digital broadcasting without performing audio output while using a video / audio signal input from analog broadcasting will be described with reference to FIG. FIG. 5 is a diagram showing channel switching in simulcast broadcasting in the present method.

  The switching unit 110 of this embodiment outputs the video / audio signal input from the analog signal processing unit 107 to the display / output unit 111 until the video / audio signal is input from the digital signal processing unit 103. At this time, particularly in this method, as shown in FIG. 5, only the video signal out of the video / audio signal input from the analog signal processing unit 107 is output and the audio signal is not output. At time T 6 when the video / audio signal is input from the digital signal processing unit 103, the video / audio signal is switched to the video / audio signal input from the digital signal processing unit 103, and both the video / audio signal is output to the display / output unit 111.

  In this method, during the period when analog broadcasting is output, the viewer is not aware of the seam between analog broadcasting and digital broadcasting by noticing that the viewer is switching by not outputting an audio signal. Can be switched.

(Method 4)
Here, the output level is increased at a certain rate during the period in which the video / audio signal input from the analog broadcast is used, and the digital broadcast is performed when the video / audio signal is input from the digital signal processing unit 103. A method of switching will be described with reference to FIG. FIG. 6 is a diagram showing channel switching in simulcast broadcasting in the present method.

  As shown in FIG. 6, switching section 110 receives a channel switching signal from channel switching signal processing section 112 (time S), and converts it from a digital broadcast signal of channel (CH1) at time S when it receives the channel switching signal. The output level of the recorded video / audio signal is stored. Subsequently, when the video / audio signal converted from the analog broadcast signal of the channel (CH2) input from the analog signal processing unit 107 is output to the display / output unit 111, a predetermined time (in FIG. 6). The output level is increased at a constant rate so that the stored output level of the video / audio signal is reached (that is, the video / audio signal is faded in).

  Next, at time T7 when the video / audio signal converted from the digital broadcast signal of the channel (CH2) is input from the digital signal processing unit 103, an output is output to the video / audio signal input from the digital signal processing unit 103. Switch. At this time, the predetermined time (fade-in time) may be before, after, or coincide with the time when the video / audio signal is input from the digital signal processing unit 103.

  In this method, during the period when analog broadcasting is output, analog and digital broadcasting can be performed by making the viewer aware that the video / audio signal output level is being increased at a constant rate. Can be switched without being aware of the seam.

(Method 5)
FIG. 7 shows a method for switching from analog broadcasting to digital broadcasting in synchronization with a channel switching signal included in the digital broadcasting signal. FIG. 7 is a diagram showing channel switching in simulcast broadcasting in the present method.

  As shown in FIG. 7, in the broadcast receiver 100 of the present embodiment, the switching unit 110 receives the video input from the analog signal processing unit 107 during the period from the switching request (time S) to the switching point (time T). / Output audio signal. At this time, after the video / audio signal is output from the digital signal processing unit 103 (time O in FIG. 7), it is input from the digital signal processing unit 103 in synchronization with the switching signal included in the digital broadcast signal. The output is switched to the video / audio signal thus made (time T in FIG. 7). That is, even when the video / audio signal is output from the digital signal processing unit 103 while the video / audio signal input from the analog signal processing unit 107 is output, the switching signal included in the digital broadcast signal is output. Switching between analog broadcasting and digital broadcasting using as a trigger.

  In this method, it is possible to switch from analog broadcasting to digital broadcasting in synchronization with a channel switching signal included in the digital broadcast signal at a timing at which the joint of the video / audio signal such as a scene break is difficult to understand. Therefore, it is possible to switch without making the viewer aware of the joint between analog broadcasting and digital broadcasting.

(Method 6)
Here, the audio signal converted from the digital broadcast signal of the channel after switching is 5.1 channel broadcast, or the video signal converted from the digital broadcast signal of the channel after switching is high-quality broadcast. A channel switching method will be described with reference to FIG. FIG. 8 is a diagram showing channel switching in simulcast broadcasting in the present method.

  As shown in FIG. 8, switching unit 110 receives a channel switching signal from channel switching signal processing unit 112 (time S), and receives channel information after switching from broadcast information processing unit 113 (time R). When the broadcast information stored in the broadcast information processing unit 113 stores that the audio signal is 5.1CH or the video signal is a high-quality broadcast, the switching unit 110 is shown in FIG. As described above, when the video / audio signal is input from the digital signal processing unit 103, the output is switched to the video / audio signal input from the digital signal processing unit 103 (time T in FIG. 8). In other words, in this method, the switching unit 110 receives a video / audio signal from the digital signal processing unit 103 and simultaneously receives a video / audio signal from the analog signal processing unit 107 from the digital signal processing unit 103. Switch the output to the selected video / audio signal.

  In this method, when the digital broadcast signal contains more information than the analog broadcast signal (for example, high-quality broadcast or 5.1CH broadcast), the viewer can enjoy it as soon as possible. Will be able to.

  In addition, although the said methods 1-6 have demonstrated the case where the channel (CH1) before switching and the channel (CH2) after switching are both simulcast broadcasting, it is not limited to this. For example, even when the channel (CH1) before switching is analog broadcasting or digital broadcasting and the channel (CH2) after switching is simulcast broadcasting, it is possible to suppress the occurrence of noise data discontinuity at the time of switching. is there.

(Additional effects of the present invention)
In a conventional broadcast receiver, it is necessary to multiplex a guide program stream to a transmission signal on the broadcast station side. Therefore, it is necessary to provide equipment for generating a guide program stream on the broadcast station side, a data band for transmitting the guide program stream, and a circuit for decoding the guide program stream on the broadcast receiver side.

  However, according to the present invention, it is not necessary to provide the above-described equipment, data band, circuit, and the like. Therefore, it is possible to greatly reduce the capital investment of the broadcasting station and the manufacturing cost of the broadcasting receiver.

FIG. 1 is a diagram illustrating a configuration of a broadcast receiver. FIG. 2 is a diagram showing channel switching in simulcast broadcasting. FIG. 3 is a diagram showing channel switching in simulcast broadcasting. FIG. 4 is a diagram showing channel switching in simulcast broadcasting. FIG. 5 is a diagram showing channel switching in simulcast broadcasting. FIG. 6 is a diagram showing channel switching in simulcast broadcasting. FIG. 7 is a diagram showing channel switching in simulcast broadcasting. FIG. 8 is a diagram showing channel switching in simulcast broadcasting. FIG. 9 is a diagram illustrating the configuration of a conventional broadcast station and digital broadcast receiver.

Explanation of symbols

100 broadcast receiver 101 broadcast signal receiver 102 broadcast signal distributor 103 digital signal processor 104 tuner / demodulator 105 demultiplexer 106 AV decoder 107 analog signal processor 108 tuner / demodulator 109 decoder 110 switching unit 111 Output unit 112 Channel switching signal processing unit 113 Broadcast information processing unit

Claims (8)

Broadcast signal receiving means for receiving a digital broadcast signal and an analog broadcast signal;
Broadcast information processing means for storing broadcast information in the broadcast signal;
Broadcast signal distribution means for distributing the broadcast signal into the digital broadcast signal and the analog broadcast signal;
Digital signal processing means for converting the digital broadcast signal into a video / audio signal;
Analog signal processing means for converting the analog broadcast signal into a video / audio signal;
Switching means for selecting and outputting the video / audio signal output from either the digital signal processing means or the analog signal processing means;
Channel switching signal processing means for receiving a channel switching signal and notifying the digital data processing means, the analog data processing means, and the switching means to the channel switching signal;
Display output means for displaying and outputting the video / audio signal output from the switching means,
The switching means, when switching from the first channel to the second channel, if the information that the second channel is a simulcast broadcast is stored in the broadcast information processing means, the digital signal processing means Video / audio from which the analog broadcast signal of the second channel from the analog signal processing means is converted until the video / audio signal from which the digital broadcast signal of the second channel is converted is output. Broadcast receiver that outputs signals. The broadcast receiver according to claim 1,
The switching means converts the digital broadcast signal of the second channel from the digital signal processing means from the video / audio signal obtained by converting the analog broadcast signal of the second channel from the analog signal processing means. The value of the output level of the audio signal serving as a reference for switching the output to the selected video / audio signal can be set, and
When the output level of the audio signal obtained by converting the analog broadcast signal of the second channel becomes equal to or lower than the above value, the video / video converted from the analog broadcast signal of the second channel from the analog signal processing means. A broadcast receiver for switching output from an audio signal to a video / audio signal obtained by converting the digital broadcast signal of the second channel from the digital signal processing means. The broadcast receiver according to claim 2,
The switching means includes the digital / digital signal from the video / audio signal obtained by converting the analog broadcast signal of the second channel from the analog signal processing means from the time when the channel switching signal processing means receives the channel switching signal. A broadcast receiver capable of setting a standby time until a time at which output is switched to a video / audio signal converted from the digital broadcast signal of the second channel from the signal processing means. The broadcast receiver according to claim 1,
The switching means converts the digital broadcast signal of the second channel from the digital signal processing means from the video / audio signal obtained by converting the analog broadcast signal of the second channel from the analog signal processing means. When the output is switched to the video / audio signal, the output level of the audio signal obtained by converting the analog broadcast signal of the second channel is lowered, and the audio signal obtained by converting the digital broadcast signal of the second channel The broadcast receiver makes the output level of the second analog broadcast channel equal to the output level of the audio signal of the second analog broadcast channel before being lowered. The broadcast receiver according to claim 1,
The switching means converts the digital broadcast signal of the second channel from the digital signal processing means from the video / audio signal obtained by converting the analog broadcast signal of the second channel from the analog signal processing means. A broadcast receiver for stopping output of an audio signal obtained by converting the analog broadcast signal of the second channel from the analog signal processing means when switching the output to a video / audio signal. The broadcast receiver according to claim 1,
The switching means converts the digital broadcast signal of the second channel from the digital signal processing means from the video / audio signal obtained by converting the analog broadcast signal of the second channel from the analog signal processing means. When the output is switched to the video / audio signal, the output level of the audio signal converted from the analog broadcast signal of the second channel from the analog signal processing means is faded in, and the analog of the second channel is A broadcast receiver that switches when the output level of the audio signal converted from the broadcast signal matches the output level of the audio signal converted from the digital broadcast signal of the second channel from the digital signal processing means. The broadcast receiver according to claim 1,
The broadcast receiver, wherein the switching means switches from the first channel to the second channel in synchronization with a switching signal included in the broadcast signal. The broadcast receiver according to claim 1,
As the broadcast information, the audio signal obtained by converting the digital broadcast signal of the second channel is a 5.1 channel broadcast, or the digital broadcast signal of the second channel is converted into the broadcast signal information processing means. When the video signal is stored as a high-quality broadcast, the switching means outputs a video / audio signal obtained by converting the digital broadcast signal of the second channel from the digital signal processing means. At the same time, from the video / audio signal converted from the analog broadcast signal of the second channel from the analog signal processing means, the video / audio signal converted from the digital broadcast signal of the second channel from the digital signal processing means. Broadcast receiver that switches output to audio signal.

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