JPH11168674A - Digital satellite receiver - Google Patents

Abstract

(57) [Summary] [Problem] In a situation where a digital satellite broadcast music program is used as BGM or environmental music, even if reception becomes poor due to snowfall or rainfall, scheduled BGM is planned.
And keep playing environmental music. SOLUTION: There is provided reception state discriminating means 1 for detecting that a reception failure state has occurred based on processing signals in demodulation circuit systems 11 and 12. During a period in which the reception failure state is not detected, the audio signal a being received is changed to the switching circuit system S.
It is led to the audio output terminal 25 via W1. During the period in which the reception failure state is detected, the music data of the appropriate music is read out from the music cartridge 20 and the synthesizer 22 is read out.
And switches the audio signal b to the switching circuit system S
It is led to the audio output terminal 25 via W2 and SW1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a perfect TV.
The present invention relates to a digital satellite broadcast receiver such as (registered trademark), and particularly relates to a reception failure countermeasure for use of a received music broadcast program or the like as background music (BGM) or environmental music.

[0002]

2. Description of the Related Art Digital satellite broadcasting "Perfect TV", whose main broadcasting started in October 1996, provides 70 channels. Including other digital satellite broadcasts in preparation,
Digital satellite broadcasting in Japan will increase to 300 channels in the near future. If the number of channels increases, the genre of the program will be subdivided and specialized. The mode of receiving and using a broadcast program is also subdivided and specialized according to the program content.

[0003] One of the usage modes for receiving digital satellite broadcasts is to use a video program as a background video (BGV) or an environmental video, or to use it as a background music or background music (BGM). The video and music received at various stores, plazas and halls are kept flowing.

[0004]

However, digital satellite broadcasting has the following disadvantages. Under bad weather such as heavy rain or snow, the broadcast waves from the satellite cannot be sufficiently captured by each receiving antenna, and the reception may be poor or unreceivable. In such a poor reception state, both video output and audio output are interrupted (muting works so as not to generate noise).

[0005] In the use form such as BGM or BGV, when the above-mentioned poor reception occurs, the environmental music and the environmental video which have been playing until then suddenly disappear, and the surrounding people who enjoyed them are enthusiastic. It makes you feel. Depending on the specific usage situation, there is a demand to avoid such a blank period of the service at all.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has as its object to convert a digital satellite broadcast music program into a broadcast program.
Under the situation where GM or environmental music is used, even if reception becomes poor due to snowfall or rainfall, a digital satellite broadcast receiver with a function to continue to play planned BGM and environmental music is provided. To provide.

[0007]

The digital satellite broadcast receiver according to the present invention is characterized by having the following requirements (1), (2) and (3). (1) A demodulation circuit system for appropriately selecting a transmission channel from an antenna input and extracting a reception data stream, and a knitting channel from a reception data stream as appropriate to select coded video data and coded audio data and control data. A demultiplexing circuit system for separating coded data, a video decoding circuit system for decoding coded video data, an audio decoding circuit system for decoding coded audio data, and various types of information exchange with users. It has a user interface circuit system for performing the operation, and a system control unit that controls these units. (2) A music cartridge that stores music data of a synthesizer control system for a large number of music pieces, a music cartridge interface circuit system that accepts the music cartridge detachably and interchangeably, and a synthesizer that generates an analog audio signal based on the music data. And a switching circuit system for selectively leading an audio signal a output from the audio decoding circuit system and an audio signal b output from the synthesizer to an audio output terminal for an external device. (3) There is provided a reception state discriminating means for detecting that a reception failure has occurred based on the processing signal in the demodulation circuit system. During a period in which the reception failure state is not detected, the audio signal a being received is led to the audio output terminal via the switching circuit system. During the period in which the poor reception state is detected, the music data of the appropriate music is read from the music cartridge and played by the synthesizer, and the audio signal b is derived to the audio output terminal via the switching circuit system. I do. In the digital satellite broadcast receiver having the above requirements, preferably, regardless of the reception state, read out the music data of the designated music piece from the music cartridge according to the user input given to the user interface circuit system, by the synthesizer An operation mode for playing the sound signal b and outputting the sound signal b to the sound output terminal via the switching circuit system is added. Preferably, a music selection genre data is set and stored in accordance with a user input given to the user interface circuit system, and a music to be played during the period in which the poor reception state is detected is determined according to the music selection genre data. Add. More preferably, the following requirements (4), (5), and (6) are added. (4) The switching circuit system selectively supplies the audio signal a, the audio signal b, and an audio signal c which is separately applied to a spare audio input terminal from an external device to the audio output terminal. Derive. (5) Setting and storing whether to activate or deactivate the spare audio input terminal in accordance with a user input given to the user interface circuit system. (6) When the auxiliary audio input terminal is set to be valid, the audio signal c applied to the auxiliary audio input terminal is transmitted via the switching circuit system during the period in which the poor reception state is detected. Derived to audio output terminal.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS === Basic Configuration and Operation of Receiver === A system microcomputer 1 controls the entire receiver. The microcomputer 1 is provided with a ROM 2 and a RAM 3. An operation panel 4 for exchanging various kinds of information with a user is connected to the microcomputer 1 via a user interface circuit 5. An I for recording billing information and the like of a pay broadcast service is also provided.
The C card 6 is connected to the microcomputer 1 via the IC card interface circuit 7. Network control circuit 8
The telephone line network is connected to the microcomputer 1 via the modem 9.

The signal captured by the antenna 10 is the tuner 1
1 is input. The tuner 11 selects a desired transmission channel. For the signal of the transmission channel selected by the tuner 11, the demodulation circuit 12 and the error correction circuit 1
In step 3, QPSK demodulation and error correction are performed. Next, if the data is scrambled, it is processed by the descrambling circuit 14. Thus, a reception data stream (transport stream) in which the MPEG2 video data, the MPEG audio data, and other control data are multiplexed can be extracted. An organization channel is appropriately selected from the received data stream to separate and extract encoded data of video and audio, and are decoded by an MPEG2 video decoding circuit 16 and an MPEG audio decoding circuit 19 to obtain a video signal and an audio signal. . The video signal is
It is led to the video output terminal 24 via the on-screen display circuit 17 and the NTSC encoder 18. The audio signal is led to an audio output terminal 25 via a switch SW1 described in detail below. The video output terminal 24 is connected to a video display, and the audio output terminal 25 is connected to an audio amplifier connected to a speaker system. Note that a personal computer or the like is connected to the data output terminal 26.

=== Characteristic Configuration of the Invention === In the receiver of this embodiment, the MIDI music cartridge 20
Use The cartridge 20 is a ROM cartridge, and stores, for example, about 50 pieces of music data expressed in the MIDI format. A number of titles of MIDI music cartridges 20 containing music data of various songs are commercially available, and these can be freely selected and used in the receiver. Music cartridge 2
Numeral 0 is detachably mounted on the cartridge interface circuit 21. In addition, there is a cartridge interface circuit of a type that can load a plurality of music cartridges at a time, so that if it is adopted, more music data can be installed in a state where it can be played immediately.

The MIDI synthesizer 22 includes a processor, a sound source, an effector, a DA converter, and the like.
0 generates analog sound signals as performance sounds of various musical instruments specified by the MIDI music data. The system microcomputer 1 reads out the MIDI music data of the tune appropriately selected from the tunes recorded in the music cartridge 20 and supplies the MIDI music data to the synthesizer 22 to generate a performance sound signal of the tune.

The audio signal output from the MIDI synthesizer 22 is applied to the input of the switch SW1 via the switch SW2. When the switch SW2 selects the input side and the switch SW1 selects the input side, MIDI
An audio signal from the synthesizer 22 is led to an audio output terminal 25.

Each music recorded in the music cartridge 20 has an attribute representing a music genre such as enka or pop in addition to attributes such as a song name and an artist name. The microcomputer 1 includes an interface circuit 21
Manages the entire attribute information of each song recorded in the music cartridge 20 loaded in the. A music list recorded in the music cartridge 20 can be displayed on the display unit of the operation panel 4, and an arbitrary music can be selected from the music list and played (details will be described later).

In this embodiment, an auxiliary audio input terminal 23 for inputting an audio signal of an external device such as a CD player or an MD player is provided. This terminal 23 is connected to the input of the switch SW2.
Whether or not the auxiliary voice input terminal 23 functions effectively is arbitrarily set by a user input from the operation panel 4.

=== Characteristic Operation of the Present Invention === FIG. 2 shows a control procedure of a characteristic operation of the receiver according to the present invention.
Is shown in the flowchart of FIG. It is assumed that a mode (BGM mode) in which a broadcasted music program is received and played in a BGM manner is selected by the operation panel 4. in this case,
As long as the reception state is good, the input side is selected by the switch SW1, and the audio signal from the MPEG audio decoding circuit 19 is derived to the audio output terminal 25 (step 100).
→ 110 → 111).

As described above, if a reception failure occurs while the BGM mode is being executed, steps 110 to 12 are executed.
The process proceeds to 0, and the switch SW1 is switched to select the input side. In the next step 121, it is checked whether or not the setting for validating the auxiliary audio input terminal 23 has been made. If the setting to enable the terminal 23 has not been made, the process proceeds to step 122, and the input side is selected by the switch SW2.

Then, the program proceeds to a step 123, at which one music piece is selected from the music pieces recorded on the music cartridge 20 loaded in the interface circuit 21, and the music data of the music piece is read out from the cartridge 20 and sequentially inputted to the MIDI synthesizer 22. I will do it. In step 123, the microcomputer 1 selects the music in order from the music list registered and registered by the user input on the operation panel 4, and the microcomputer 1 appropriately selects the music belonging to the music genre registered by the user input on the operation panel 4. There is a method and a method in which the microcomputer 1 selects music at all at random.

An audio signal of a music piece played by the MIDI synthesizer 22 is led to an audio output terminal 25 via switches SW1 and SW2. Thus, when the reception failure state occurs during the execution of the BGM mode, the music to be played by the MIDI synthesizer 22 instead of the music program being received is output from the speaker connected to the audio output terminal 25.

In the process of outputting music by the MIDI synthesizer 22 as sound, it is checked whether or not the operation mode has been changed (step 12).
5) It is checked whether the poor reception state has been recovered (step 126). If the mode is changed, the process returns to the first step 100, and if the poor reception condition is recovered, the process returns to the step 111, where the input is selected by the switch SW1, and the music program to be received is output as sound. If the reception failure state continues, steps 123 to 127 are repeated, and the music selected from the music cartridge 20 is output as sound.

If the setting to enable the auxiliary audio input terminal 23 has been made, the process proceeds from step 121 to step 130, where the input is selected by the switch SW2 and the process returns to the first step 100. In this case, no MIDI performance is performed, and an audio signal from, for example, a CD player connected to the terminal 23 is output from the audio output terminal 25 via the switches SW2 and SW1.
And the music is output as voice.

In addition, not only when a reception failure occurs in the BGM mode but also at any time, an arbitrary music cartridge 20 can be loaded, and a music in the music can be arbitrarily selected and played. Such an operation mode is called a MIDI mode. In this mode, step 100 → 200 → 2
01, the input is selected by the switch SW1, and the input is selected by the switch SW2, and steps 202 → 203 → 204 → 2
In the process 05, the music data of the music cartridge 20 is played by the synthesizer 22 and output as sound. A list of songs recorded in the music cartridge 20 is displayed on the operation panel 4, and any song in the list can be selected and played.

[0022]

According to the present invention, in a situation where a digital satellite broadcast music program is used as BGM or environmental music, even if reception becomes poor due to snowfall or rainfall, it is planned. You can keep playing BGM and environmental music.
Music played during the reception failure period is MIDI
Music data in the form of a format.Music data of a large number of songs are recorded in a single cartridge.Multiple titles of music cartridges containing various music data can be arbitrarily selected and detached from this receiver. It can be loaded freely. Therefore, it is possible to respond finely and accurately according to the environment and the atmosphere of each user who needs the BGM.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a digital satellite broadcast receiver according to one embodiment of the present invention.

FIG. 2 is a flowchart of a control procedure for realizing a characteristic operation of the present invention in the embodiment.

[Description of Signs] 1 System microcomputer (system control unit) 4 Operation panel 5 User interface circuit 11 Tuner 12 Demodulation circuit 15 Demultiplexer circuit 19 MPEG audio decoding circuit 20 Music cartridge 21 Cartridge interface circuit 22 MIDI synthesizer 23 Auxiliary audio input terminal 25 Audio output terminal SW1 / SW2 switch

Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI // G10K 15/04 302 G10K 15/04 302D

Claims (4)

[Claims] 1. A digital satellite broadcast receiver having the following requirements (1), (2) and (3). (1) A demodulation circuit system for appropriately selecting a transmission channel from an antenna input and extracting a reception data stream, and a knitting channel from a reception data stream as appropriate to select coded video data and coded audio data and control data. A demultiplexing circuit system for separating coded data, a video decoding circuit system for decoding coded video data, an audio decoding circuit system for decoding coded audio data, and various types of information exchange with users. It has a user interface circuit system for performing the operation, and a system control unit that controls these units. (2) A music cartridge storing music data of a synthesizer control method for a large number of music pieces, a music cartridge interface circuit system for removably accepting the music cartridge, and a synthesizer for generating an analog audio signal based on the music data. And a switching circuit system for selectively outputting an audio signal a output from the audio decoding circuit system and an audio signal b output from the synthesizer to an audio output terminal for an external device. (3) There is provided a reception state discriminating means for detecting that a reception failure has occurred based on the processing signal in the demodulation circuit system. During a period in which the reception failure state is not detected, the audio signal a being received is led to the audio output terminal via the switching circuit system. During the period in which the poor reception state is detected, the music data of the appropriate music is read from the music cartridge and played by the synthesizer, and the audio signal b is derived to the audio output terminal via the switching circuit system. I do. 2. The digital satellite broadcast receiver according to claim 1, wherein said music data of a designated music piece is read from said music cartridge according to a user input given to said user interface circuit system regardless of a reception state. Then, the music signal is played by the synthesizer, and the audio signal b is led out to the audio output terminal via the switching circuit system. 3. The digital satellite broadcast receiver according to claim 1, wherein music selection genre data is set and stored in accordance with a user input given to said user interface circuit system, and said reception failure state is set. Is determined in accordance with the music selection genre data. 4. The digital satellite broadcast receiver according to claim 1, wherein each of the following requirements (4) and (5):
(6) is provided. (4) The switching circuit system selectively supplies the audio signal a, the audio signal b, and an audio signal c which is separately applied to a spare audio input terminal from an external device to the audio output terminal. Derive. (5) Setting and storing whether to activate or deactivate the spare audio input terminal in accordance with a user input given to the user interface circuit system. (6) When the auxiliary audio input terminal is set to be valid, the audio signal c applied to the auxiliary audio input terminal is transmitted via the switching circuit system during the period in which the poor reception state is detected. Derived to audio output terminal.