JP2005191937A - Multi-system compatible receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multi-system broadcast compatible receiver in which image display time immediately after activation is shortened and power consumption at the time of set standby is suppressed. <P>SOLUTION: The receiver comprises a first CPU 8 for controlling the tuning, demodulation, video signal processing and video signal output of analog broadcasting; a second CPU 6 for controlling the tuning, demodulation, decoding and video signal output of digital broadcasting, and a switch 13 for switching the video signal output of the analog broadcasting and the video signal output of the digital broadcasting. When set power is supplied, the first CPU 8 switches the switch 13 on the basis of electronic program information acquired from the digital broadcasting and preferentially displays the video signals of the analog broadcasting. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a multi-system receiving apparatus compatible with digital broadcasting and analog broadcasting, and more particularly to a technique for shortening the activation time of the multi-system receiving apparatus.

  In recent years, television broadcasting has been provided with services of digital terrestrial broadcasting and digital cable broadcasting together with conventional NTSC analog broadcasting. In many cases, a digital broadcast program and an NTSC analog broadcast program broadcast a common program at the same time.

  However, it has been found that receiving digital broadcasts takes longer than receiving analog broadcasts. In order to solve this problem, it has been proposed to preferentially display analog broadcasting when digital broadcasting and analog broadcasting broadcast a common program at the same time.

  Hereinafter, an example of a conventional multi-system receiving apparatus will be described with reference to FIG. FIG. 5 is a block diagram showing a configuration of a conventional multi-system receiving apparatus.

  As shown in FIG. 5, the conventional multi-system receiving apparatus includes an RF modulated wave input terminal 101. In addition, a digital tuner 102, a digital demodulation circuit 103, a transport decoder 104, and a digital decoded signal processing circuit 105 are provided for displaying digital broadcasting. In addition, an analog tuner 110, an analog demodulation circuit 111, and an analog video signal processing circuit 112 are provided for displaying analog broadcasting. Furthermore, a CPU 114 that controls the entire system, an electronic program information storage unit 107 that stores electronic program information (EPG) obtained from digital broadcasting, and a switch 113 are provided.

  Next, the operation of a conventional multi-system receiving apparatus that supports digital broadcasting and analog broadcasting will be described.

  The IF signal output from the digital tuner 102 is demodulated by the digital demodulation circuit 103 and is output to the transport decoder 104 as transport data. The transport decoder 104 extracts video data from the transport data and outputs it to the digital decoding processing circuit 105. The digital decoding processing circuit 105 outputs the MPEG decoded video data to the switch 113 as an analog video signal.

  First, when receiving a digital broadcast, the CPU 114 controls the digital tuner 102 to select a channel for the RF modulated wave input from the RF modulated wave input terminal 101. The IF signal output from the digital tuner 102 is demodulated by the digital demodulation circuit 103 and is output to the transport decoder 104 as transport data. The transport decoder 104 extracts video data from the transport data and outputs it to the digital decoding processing circuit 105. The digital decoded signal processing circuit 105 outputs the MPEG decoded video data to the switch 113 as an analog video signal.

  Next, when receiving an analog broadcast, the CPU 114 controls the analog tuner 110 to select a channel for the RF modulated wave input from the RF modulated wave input terminal 101. The IF signal output from the analog tuner 110 is subjected to quadrature detection processing by the analog demodulation circuit 111, converted from the modulated wave to a baseband video signal, and output to the analog video signal processing circuit 112. The analog video signal processing circuit 112 performs analog video processing and outputs it to the switch 113.

  The CPU 114 has functions of selecting the digital tuner 102 and the analog tuner 110, controlling each processing circuit, and switching the switch 113 in order to output a desired video. In addition, the CPU 114 stores electronic program information obtained from digital broadcasting in the electronic program information storage unit 107, and performs simultaneous program information management of analog broadcasting and digital broadcasting.

At the time of high-speed channel search, the CPU 114 refers to the electronic program information storage unit 107 in which the simultaneous program information is stored. Is output to switch the switch 113 (for example, Patent Document 1).
JP 2001-285552 A

  However, the conventional configuration described above shortens the channel selection time at the time of high-speed channel search, and does not improve the time until the channel that was previously selected immediately after the set power is turned on and displayed on the screen. . In recent years, digital products such as multi-system receivers are equipped with a CPU equipped with an OS and a digital LSI. As system control, it is necessary to download the OS after BOOT-UP, expand the compressed data, perform microcode download and initial setting of each device, and spend a considerable time for starting up the system. He also spent time on digital tuner tuning and video decoding. For this reason, it took a considerable amount of time to display the video of the previously selected channel on the screen.

  SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and an object of the present invention is to provide a multi-system broadcast-compatible receiving apparatus that shortens the screen display time immediately after startup and suppresses power consumption during set standby.

  In order to solve the above-described problems, a first control unit that controls channel selection, demodulation, video signal processing, and video signal output of analog broadcasting, and a first control unit that controls channel selection, demodulation, decoding, and video signal output of digital broadcasting. A second control unit and a video signal switching circuit that switches between an analog broadcast video signal output and a digital broadcast video signal output, and when the set power is turned on, the first control unit receives the electronic signal acquired from the digital broadcast. The video signal switching circuit is switched based on program information to preferentially display an analog broadcast video signal.

  According to the multi-system broadcast-compatible receiving apparatus of the present invention, the screen display time immediately after startup can be shortened, and the power consumption during standby can be suppressed.

  According to the multi-system receiving apparatus according to the present invention, the first control unit refers to the simultaneous program so that, when the set power is turned on, instead of outputting a digital broadcast that takes time to display the screen, It can be switched to output an analog broadcast video signal that does not take much time. Therefore, the screen can be displayed in a shorter time after the set power is turned on.

  In the multi-system receiving apparatus according to the present invention, it is preferable that the first control unit operates even during a set standby. Since the first control unit is also operating during set standby, time for downloading the OS is not required, and the time until screen display is shortened. Furthermore, if the power supply of unnecessary circuits other than the first control unit is in an off state, it is possible to suppress power consumption when the set is on standby.

  The multi-system receiving apparatus according to the present invention further includes a channel selection information storage unit for storing the latest channel selection information selected by a viewer, and when the set power is turned on, the first control unit By comparing the channel selection information with the broadcast information of the analog broadcast and digital broadcast extracted from the program information, if there is an analog broadcast by the same broadcast station as the broadcast station of the channel selection information, the channel selection information It is preferable to output an analog broadcast video signal from the same broadcast station. As a result, the latest channel selection information selected by the viewer is compared with the broadcast station information. When the broadcast station of the channel selection information is broadcasting an analog broadcast, the broadcast station of the channel selection information Analog broadcasting can be output with priority over digital broadcasting.

  In the multi-system compatible receiving device according to the present invention, the first control unit further includes a selection information storage unit that can be read and written, and the second control unit acquires the electronic program information from digital broadcasting, and It is preferable that the broadcasting station information of analog broadcasting and digital broadcasting is extracted from electronic program information and stored in the selection information storage unit. Broadcast station information necessary for grasping simultaneous broadcasting of analog broadcasting and digital broadcasting can be stored in a selection information storage unit that can be read and written by the first control unit. Thus, it is not necessary to store a large amount of data of electronic program information, and the selection information storage unit may be a small-capacity storage area.

  The multi-system compatible receiving apparatus according to the present invention further includes a channel selection information storage unit that stores the latest channel selection information selected by a viewer, and when the set power is turned on, the first control unit By comparing the channel selection information with the analog broadcast and digital broadcast simultaneous program information extracted from the program information, if there is the same analog broadcast program by the same broadcast station as the channel selection information, It is preferable to output a video signal of the same program of the analog broadcast by the same broadcast station as the channel selection information broadcast station. Thus, by checking the channel selection information selected by the viewer and the simultaneous program information, if the program of the broadcast station of the channel selection information is also broadcasted by analog broadcasting, the broadcast of the channel selection information The station's analog broadcast program can be output in preference to the digital broadcast program.

  In the multi-system compatible receiving device according to the present invention, the first control unit further includes a selection information storage unit that can be read and written, and the second control unit acquires the electronic program information from digital broadcasting, and It is preferable that the simultaneous program information of the analog broadcast and the digital broadcast is extracted from the electronic program information and stored in the selection information storage unit. Simultaneous broadcasting information necessary for grasping simultaneous broadcasting of analog broadcasting and digital broadcasting can be stored in a selection information storage unit that can be read and written by the first control unit. Thus, it is not necessary to store a large amount of data of electronic program information, and the selection information storage unit may be a small-capacity storage area.

  In the multi-system receiving apparatus according to the present invention, when the set is activated, the first control unit displays a message indicating that the set is activated on the screen until the digital broadcast video signal can be output. Is preferred. When the set is activated, a message can be displayed on the screen while the second control unit prepares for digital broadcast output. Thereby, the screen display waiting time can be eliminated.

Hereinafter, more specific embodiments of the present invention will be described with reference to the drawings.
(Embodiment 1)
A multi-system receiving apparatus according to the first embodiment of the present invention will be described.

  FIG. 1 is a block diagram showing a configuration of a multi-system receiving apparatus according to the first embodiment of the present invention.

  As shown in FIG. 1, the multi-system receiving apparatus according to the first embodiment of the present invention includes an RF modulated wave input terminal 1. Further, a digital tuner 2, a digital demodulation circuit 3, a transport decoder 4, and a digital decoded signal processing circuit 5 are provided for displaying digital broadcasting. In addition, an analog tuner 10, an analog demodulation circuit 11, and an analog video signal processing circuit 12 are provided for displaying analog broadcasting.

  Also, a first CPU 8 that controls analog broadcast channel selection, demodulation, video signal processing, video signal output, and the like, and a second CPU 6 that controls digital broadcast channel selection, demodulation, video signal processing, video signal output, and the like. With. In addition, an electronic program information storage unit 7 that stores electronic program information obtained from digital broadcasting, a channel selection information storage unit 9 that stores information extracted from the electronic program information, and a switch 13 are provided. Electronic program information obtained from digital broadcasting uses EPG (Electric Program Guide) or the like.

  The operation of the multi-system receiving apparatus according to the first embodiment of the present invention will be described. First, as shown in FIG. 1, a case where the power source of the set is in an operating state will be described below.

  When receiving a digital broadcast, the second CPU 6 controls the digital tuner 2 to select a channel for the RF modulated wave input from the RF modulated wave input terminal 1. The IF signal output from the digital tuner 2 is demodulated by the digital demodulating circuit 3 and is output to the transport decoder 4 as transport data. The transport decoder 4 extracts video data from the transport data and outputs it to the digital decoding processing circuit 5. The digital decoding processing circuit 5 outputs the MPEG decoded video data as an analog video signal to the switch 13 (second path).

  Next, when receiving an analog broadcast, the first CPU 8 controls the analog tuner 10 to select a channel of the RF modulated wave input from the RF modulated wave input terminal 1. The IF signal output from the analog tuner 10 is subjected to quadrature detection processing by the analog demodulation circuit 11, converted from the modulated wave to a baseband video signal, and output to the analog video signal processing circuit 12. The analog video signal processing circuit 12 performs analog video processing and outputs it to the switch 13 (first path).

  The second CPU 6 stores all the EPG information including the analog broadcast and the digital broadcast obtained from the digital broadcast in the electronic program information storage unit 7. The first CPU 8 communicates with the second CPU 6, acquires simultaneous program information of analog broadcasting and digital broadcasting, broadcasting station information, and the like from the electronic program information storage unit 7 and stores them in the tuning information storage unit 9. Further, the first CPU 8 stores the channel number of the station that broadcasts only the analog broadcast in the channel selection information storage unit 9 at the initial setting.

  FIG. 2 is an explanatory diagram showing the configuration of the channel selection information storage unit 9.

  As illustrated in FIG. 2, the channel selection information storage unit 9 includes regions 9a to 9d. The area 9a is the latest channel management area for storing the latest channel number currently selected without distinguishing between digital broadcasting and analog broadcasting. The area 9b is an analog broadcast channel number management area that stores the channel numbers of broadcast stations that broadcast only analog broadcasts, which are acquired at the time of initial setting. The area 9 c is a simultaneous program information management area for storing analog broadcast and digital broadcast simultaneous program information obtained from the electronic program information storage unit 7. The area 9d is a broadcasting station channel number management area for storing broadcasting station channel numbers and the like acquired from the electronic program information storage unit 7.

  Next, as an example, the operation of the multi-system receiving apparatus according to the present embodiment when the user selects a channel will be described with reference to FIG. FIG. 3 is a flowchart of the system control operation at the time of channel selection.

  First, the user selects a channel with a remote controller or the like (step 200).

  Next, the first CPU 8 detects a channel selection instruction from the user (step 201).

  Next, the channel number selected by the user is stored in the latest channel management area 9a of the channel selection information storage unit 9 (step 202). The first CPU 8 refers to the analog broadcast channel number management area 9b of the channel selection information storage unit 9 (step 203).

  Next, it is determined whether or not the channel number selected by the user exists in the analog broadcast channel number management area 9b (step 204). If the channel number is present in the analog broadcast channel number management area 9b as a result of the determination in step 204 (Yes), the channel number is a broadcasting station that performs analog broadcasting. Proceed with In step 205, the first CPU 8 selects an analog broadcast of the channel number, and in step 206, the received video is displayed on the screen.

  However, if the channel number selected by the user does not exist in the analog broadcast channel number management area 9b as a result of the determination in step 204 (No), the channel number is a broadcasting station that does not perform analog broadcasting. The process proceeds to step 207. In step 207, the first CPU 8 communicates with the second CPU 6 to instruct to select a broadcasting station that is performing digital broadcasting.

  Further, the second CPU 6 selects a digital broadcast (step 208) and proceeds to step 209. In step 209, the second CPU 6 acquires EPG information that is downloaded together with the video data during reception of the digital broadcast, and stores it in the electronic program information storage unit 7.

  Next, it is determined whether simultaneous program information, broadcasting station information, etc. of analog broadcasting and digital broadcasting are present in the EPG information acquired by downloading (step 210). If it is determined in step 210 that simultaneous program information, broadcast station information, and the like are present in the EPG information (Yes), the process proceeds to step 211. In step 211, the second CPU 6 communicates with the first CPU 8 to deliver analog program and digital broadcast simultaneous program information, broadcasting station information, and the like, and proceeds to step 212. In step 212, the first CPU 8 stores the received simultaneous program information in the simultaneous program information management area 9 c of the channel selection information storage unit 9, and broadcast station information in the broadcast station channel number management of the channel selection information storage unit 9. Store in area 9d and proceed to step 213. In step 213, the second CPU 6 displays the received video of the digital broadcast of the channel number selected by the user on the screen.

  However, if the result of determination in step 210 is that simultaneous program information, broadcast station information, etc. are not present in the EPG information (No), the process returns to step 209. The second CPU 6 repeats Steps 209 and 210 until EPG information to be acquired includes simultaneous program information of analog broadcasting and digital broadcasting, broadcast station information, etc., and monitors the EPG information.

  Next, as an example, an operation of the multi-system receiving apparatus according to the present embodiment when the set is turned on will be described with reference to FIG. FIG. 4 is a flowchart of the system control operation when the power is turned on.

  The first CPU 8 according to the present embodiment monitors whether the set is powered on in the operating state even when the power supply of the set is in a standby state. Note that the operation of the first CPU 8 does not mean an operation in the absence of power supply, but means that the operation is performed by a weak power source such as a battery.

  First, the user turns on the set with a remote controller or the like (step 300).

  Next, the first CPU 8 that detects the power-on of the set refers to the latest channel management area 9a of the channel selection information storage unit 9 (step 301).

  Next, it is determined whether or not the latest channel program in the channel management area 9a exists in the analog broadcast channel number management area 9b of the channel selection information storage unit 9 (step 302). If the channel number is present in the analog broadcast channel number management area 9b as a result of the determination in step 302 (Yes), the channel number is analog broadcast and the process proceeds to step 303. In step 303, the first CPU 8 selects an analog broadcast on the channel number, and the received video is displayed on the screen (step 311).

  However, if the channel number of the latest channel management area 9a does not exist in the analog broadcast channel number management area 9b of the channel selection information storage unit 9 as a result of the determination in step 302 (No), the channel number is Proceed to step 304 instead of broadcasting. In step 304, the first CPU 8 refers to the simultaneous program information management area 9 c of the channel selection information storage unit 9.

  Next, it is determined whether or not the same program as the program with the channel number of the latest channel management area 9a exists in the simultaneous program information management area 9c of the channel selection information storage unit 9 (step 305). If the channel number is present in the simultaneous program information management area 9c as a result of the determination in step 305 (Yes), the same program as the program in the channel number is simultaneously broadcast by analog broadcasting, Proceed to step 306. In step 306, the first CPU 8 selects an analog broadcast on the channel number, and in step 311, the received video is displayed on the screen.

  However, if it is determined in step 305 that the same program as the channel number in the latest channel management area 9a does not exist in the simultaneous program information management area 9c of the channel selection information storage unit 9 (No), The same program as the program with the number is not simultaneously broadcast by analog broadcasting, and the process proceeds to step 307. In step 307, the first CPU 8 refers to the broadcast station channel program management area 9 c of the channel information in the channel selection information storage unit 9.

  Next, it is determined whether or not a broadcasting station having the same channel number as the latest channel management area 9a exists in the broadcasting station channel number management area 9d of the channel selection information storage unit 9 (step 308). If the result of determination in step 308 is that the same broadcast station as the channel number is present in the broadcast station channel number management area 9d (Yes), analog broadcasting is in progress and processing proceeds to step 309. In step 309, the first CPU 8 selects an analog broadcast in the channel number, and in step 311, the received video is displayed on the screen.

  However, if the result of determination in step 308 is that the same broadcast station as the channel number of the latest channel management area 9a does not exist in the broadcast station channel number management area 9d of the channel selection information storage unit 9 (No), The same broadcasting station in the number is not broadcasted in analog, and the process proceeds to step 310. In step 310, the first CPU 8 performs an on-screen display (OSD) output indicating that it is starting up, and in step 311, a message is displayed on the screen.

  In addition, while displaying the analog broadcast in the case of step 303, 306 and step 309, it is preferable that the first CPU 8 instructs the OSD output which means that the digital broadcast is being activated, and performs the OSD display.

  Although not shown in FIG. 4, during the analog broadcasting or OSD display in steps 306, 309 and 310, the second CPU 6 displays the channel in the latest channel management area 9 a of the channel selection information storage unit 9. Receive digital broadcasts of information. After completion of decoding and the like, the completion of the start of digital broadcasting is transmitted to the first CPU 8 by communication. Next, the first CPU 8 switches the switch 13 to digital broadcasting and displays the digital broadcasting on the screen.

  As described above, in the first embodiment, the first CPU for analog broadcast channel selection and the first path from the input terminal to the switch through the analog tuner, the analog demodulation circuit, and the analog video signal processing circuit are provided. It was. A second path is provided from the second CPU 6 for digital broadcast channel selection and the input terminal to the switch through the digital tuner, the digital demodulation circuit, the transport decoder, and the digital decoding processing circuit. Further, the first CPU 8 is configured to manage the simultaneous program information.

  With this configuration, when the set is activated, the analog broadcast broadcast simultaneously with the digital broadcast can be preferentially displayed on the screen. Thereby, the screen display time of the channel selection program at the time of starting can be shortened. Further, since only the first CPU needs to be activated during the set standby, the power consumption during the set standby can be reduced.

  In the present embodiment, as shown in FIG. 2, the channel selection information storage unit is a single memory having a plurality of areas, but the present invention is not limited to this example. Each area may be stored in a separate memory as long as it can be referred from the first CPU.

  The multi-system receiving apparatus according to the present invention can shorten the received video display time by preferentially selecting an analog broadcast when power is turned on, and is useful as a television built-in type receiving apparatus or the like.

It is a block diagram which shows the structure of the multi-system corresponding | compatible receiving apparatus in Embodiment 1 of this invention. It is explanatory drawing which shows the structure of the program information storage part in the multi-system corresponding | compatible receiving apparatus in Embodiment 1 of this invention. It is a system control operation | movement flowchart figure at the time of channel selection of the multi-system corresponding | compatible receiver in Embodiment 1 of this invention. It is a system control operation | movement flowchart figure at the time of the power activation of the multi-system corresponding | compatible receiver in Embodiment 1 of this invention. It is a block diagram which shows the structure of the conventional multi-system corresponding | compatible receiving apparatus.

Explanation of symbols

1, 101 RF modulation wave input terminal 2, 102 Digital broadcasting tuner 3, 103 Digital demodulation circuit 4, 104 Transport decoder 5, 105 Digital decoded signal processing circuit 6, 106 Second CPU
7, 107 EPG information storage unit 8, 108 First CPU
9, 109 Channel selection information storage unit 9a Latest channel management area 9b Analog broadcast channel number management area 9c Simultaneous program information management area 9d Broadcast station channel number management area 10, 110 Analog broadcast tuner 11, 111 Analog demodulation circuit 12, 112 Analog video signal processing circuit 13, 113 switch 114 control unit CPU

Claims (7)

A first controller that controls analog broadcast channel selection, demodulation, video signal processing, and video signal output;
A second control unit for controlling channel selection, demodulation, decoding and video signal output of digital broadcasting;
A video signal switching circuit for switching between an analog broadcast video signal output and a digital broadcast video signal output;
When the set power is turned on, the first control unit switches the video signal switching circuit on the basis of electronic program information acquired from digital broadcasting, and preferentially displays an analog broadcasting video signal. Multi-system receiver. The multi-system compatible receiving apparatus according to claim 1, wherein the first control unit also operates during set standby. It further includes a channel selection information storage unit for storing the latest channel selection information selected by the viewer,
When the set power is turned on, the first control unit compares the channel selection information with the broadcast station information of analog broadcast and digital broadcast extracted from the electronic program information, and is the same as the broadcast station of the channel selection information 3. The multi-system receiving apparatus according to claim 1, wherein if an analog broadcast by a broadcast station exists, a video signal of the analog broadcast by the same broadcast station as the broadcast station of the channel selection information is output. The first control unit further comprises a selection information storage unit that can be read and written,
The said 2nd control part acquires the said electronic program information from a digital broadcast, extracts the said broadcast station information of an analog broadcast and a digital broadcast from the said electronic program information, and stores it in the said selection information storage part. The multi-mode receiver described in 1. It further includes a channel selection information storage unit for storing the latest channel selection information selected by the viewer,
When the set power is turned on, the first control unit compares the channel selection information with the analog broadcast and digital broadcast simultaneous program information extracted from the electronic program information, and is the same as the broadcast station of the channel selection information 3. The multi-system according to claim 1, wherein if there is the same analog broadcast program by a broadcasting station, a video signal of the same analog broadcast program by the same broadcasting station as the channel selection information is output. Compatible receiving device. The first control unit further comprises a selection information storage unit that can be read and written,
The said 2nd control part acquires the said electronic program information from a digital broadcast, extracts the said simultaneous program information of an analog broadcast and a digital broadcast from the said electronic program information, and stores it in the said selection information storage part. The multi-mode receiver described in 1. The set forth in any one of claims 1 to 6, wherein when the set is activated, the first control unit displays a message indicating that the set is activated on the screen until a digital broadcast video signal can be output. Multi-system compatible receiver.

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