JP2004235929A - Digital satellite broadcast receiving system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a digital satellite broadcast receiver which allows a tuner for digital satellite broadcast reception to be connected to an existing audio set or the like. <P>SOLUTION: A connection means for connection to a CD changer, which an existing audio set 20 has is utilized, and communication protocols executed between the CD changer and the audio set are utilized to exchange control signals or the like between the existing audio set and a tuner 12 for digital satellite broadcast reception. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a broadcast receiver, and more particularly, to a digital satellite broadcast receiver.
[0002]
[Prior art]
With the spread of digital satellite broadcasting, digital satellite broadcasting has been received using a dedicated receiver (for example, see Patent Documents 1 and 2 below). However, in order to be able to receive digital satellite broadcasting using an existing radio or audio set, it is necessary to add a tuner for receiving digital satellite broadcasting to the existing set.
[0003]
[Patent Document 1]
JP-A-11-261501 (FIG. 1)
[Patent Document 1]
JP-A-11-251941 (FIG. 1)
[0004]
[Problems to be solved by the invention]
However, in order to be able to receive digital satellite broadcasts using the existing existing radio and audio sets, special connectors and cables are required to connect the existing set to the tuner for digital satellite broadcast reception. Further, it is necessary to determine a communication format for transmitting and receiving signals between the two, and it has not been possible to easily connect a tuner for digital satellite broadcast reception to an existing set.
[0005]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a digital satellite broadcast receiving apparatus capable of easily connecting a tuner for digital satellite broadcast reception to an existing audio set or the like.
[0006]
[Means for Solving the Problems]
The digital satellite broadcast receiving apparatus of the present invention can be connected to an audio set having a connection means for connecting to a CD changer via the connection means,
A digital satellite broadcast tuner that receives a digital satellite broadcast and selects a desired channel by an external control signal;
The connection means controls the digital satellite broadcast tuner by the operating means of the audio set, and displays the data obtained from the signal received by the digital satellite broadcast tuner as characters on a display section of the audio set. Interface means for performing communication between the audio set and the digital satellite broadcast receiving device via
Configuration.
[0007]
With this configuration, only by connecting the digital satellite broadcast receiving apparatus via the CD changer connection means of the audio set, the operation means of the audio set performs tuning control of the tuner and obtains from the signal received by the tuner. The data, that is, the name of the broadcasting station, the title of the music, the name of the musician, and the like can be displayed as characters on the display unit of the audio set.
[0008]
Further, the digital satellite broadcast receiving apparatus of the present invention can be connected to an audio set having connection means for connecting to a CD changer via the connection means,
A digital satellite broadcast tuner that receives a digital satellite broadcast and selects a desired channel by an external control signal;
A decoder for creating data for performing predetermined character display in accordance with a digital satellite broadcast signal received by the digital satellite broadcast tuner;
As the external control signal, via the connection means, receives a signal from the audio set, and an interface means for transmitting the received digital satellite broadcast signal and the data to the audio set,
Configuration.
[0009]
With this configuration, only by connecting the digital satellite broadcast receiving apparatus via the CD changer connection means of the audio set, the operation means of the audio set performs tuning control of the tuner and obtains from the signal received by the tuner. The data, that is, the name of the broadcasting station, the title of the music, the name of the musician, and the like can be displayed as characters on the display unit of the audio set.
[0010]
Further, in addition to the above configuration, the digital satellite broadcast receiving apparatus of the present invention further includes means for determining whether or not the audio set corresponds to a format for receiving digital satellite broadcasts, and the audio set for receiving digital satellite broadcasts. If the audio set does not correspond to the format for receiving digital satellite broadcasts, means for setting the function to use the function, if the audio set does not correspond to the format for receiving digital satellite broadcasting, and predetermined means for selecting the audio set. Means for setting the generated signal as the control signal.
[0011]
With this configuration, appropriate settings can be made according to whether or not the audio set supports digital satellite broadcast reception.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an external view showing a preferred embodiment of a digital satellite broadcast receiving apparatus according to the present invention connected to an existing audio set. FIG. 2 is a block diagram showing the internal structure of the configuration shown in FIG.
[0013]
1 and 2, the digital satellite broadcast receiving apparatus 10 has a tuner (hereinafter simply referred to as a tuner) 12 for receiving digital satellite broadcasts. The tuner 12 is connected to an antenna 12A via a feeder 12B. I have. The digital satellite broadcast receiver 10 further includes a decoder 14 which responds to an output signal of the tuner 12, a CPU (Central Processing Unit) 16, and an interface (I / F) 18. The decoder 14 decodes various information (broadcast song title, broadcast content category, music song title, player name, etc.) contained in the output signal of the tuner 12 as characters, and decodes the audio set 20 via the interface 18. To send to. The CPU 16 controls the tuner 12 and the decoder 14, respectively, and operates according to a basic program read from a memory (not shown). As described later, when an external control signal sent from the audio set 20 is received, the CPU 16 sends a tuning instruction signal to the tuner 12 to tune to a desired station.
[0014]
Here, a car audio mounted on a car will be described as an example of the audio set. In general, a car audio has an AM / FM tuner and an amplifier for amplifying a signal received from the tuner and an amplifier for amplifying a reproduction signal from a CD player or a CD changer. The description will be made assuming that the apparatus has an / FM tuner 40 and an amplifier 44 that amplifies the received signal and amplifies a reproduction signal from a CD changer (not shown). The AM / FM tuner 40 is connected to an antenna 29A via a feeder 29B.
[0015]
Although operation knobs 22, 24, and 26 are provided, the operation knob 22 is a disk switching knob for switching disks of the CD changer. The operation knob 24 is a track switching knob for switching tracks. The operation knob 26 is a volume adjustment knob. These knobs 22, 24, 26 are connected to the CPU 46. An output signal of the AM / FM tuner 40 is supplied to an amplifier 44 via a multiplexer (MPX) 42. The output signal of the amplifier 44 is supplied to the external speaker 27. The CPU 46 is connected to the connector 32 via an interface (I / F) 48 and to the connector 34 of the tuner 12 via the cable 30. The CPU 46 is connected to the AM / FM tuner 40, the amplifier 44, and the multiplexer 42, respectively.
[0016]
The configuration of FIG. 2 operates as follows. The connector 32 of the audio set 20 is usually for connecting a CD changer, but here, the digital satellite broadcast receiver 10 is connected instead of connecting a CD changer. The interface 48 of the audio set 20 transmits a control signal generated by the CPU 46 in response to the operation of the disk switching knob 22 and the track switching knob 24 to the CD changer according to a predetermined protocol, and receives a signal from the CD changer. And has a function of sending the data to the CPU 46. Therefore, if the interface 18 of the digital satellite broadcast receiving apparatus 10 is the same as the interface of the CD changer, the operation from the audio set 20 side allows the digital satellite broadcast to be operated in exactly the same manner as operating the CD changer. The broadcast receiver 10 can be operated.
[0017]
The display switching of the category of the broadcast content received by the tuner 12 is enabled by the disk switching knob 22. The categories include “rock”, “jazz”, “classic”, and the like, and a well-known graphic equalizer control according to each category can be performed. The track switching knob 24 is used for a channel selection operation of the tuner 12, that is, for channel switching. When a control signal corresponding to the operation of the track switching knob 24 is generated by the CPU 46, the control signal is given to the CPU 16 via the interface 48, the connector 32, the cable 30, the connector 34, and the interface 18, and the tuner 12 is selected. Are generated by the CPU 16.
[0018]
The tuner 12 extracts a signal of a desired broadcast station selected by the user from a broadcast signal included in a radio wave received by the antenna 12A, and sends the signal to the decoder 14. The decoder 14 extracts various information included in the signal, that is, a broadcast station name, a music title, a category, a player name, and the like as a character signal. The output signal of the tuner 12 and the output signal of the decoder 14 are sent to the audio set 20 via the interface 18. The CPU 46 also controls display of characters to be displayed on the display unit 28 in response to operations of the disk switching knob 22 and the track switching knob 24. Therefore, assuming that "jazz" is selected as the category by the disc switching knob 22 and the channel 8 is selected by the track switching knob 24, the display unit displays, for example, the display unit 28 of FIG. As shown in FIG. 2, the channel number, the station name, and the category such as “CH8”, “Satellite Yokohama”, and “Jazz” are displayed, and when music is received, “○○○” in FIG. ", The name of the performer (singer) and the like are displayed.
[0019]
In accordance with the selection of the category, the CPU 46 controls the frequency characteristic of the amplifier 44 to perform the graphic equalizer control. The CPU 46 controls the amplification of the amplifier 44 by operating the volume control knob 26. The multiplexer 42 selects one of an output signal of the AM / FM tuner 40 and a signal transmitted from the digital satellite broadcast receiver 10 and transmitted through the CPU 46 under the control of the CPU 46 and supplies the selected signal to the amplifier 44. I have.
[0020]
In the above-described embodiment, the case where the digital satellite broadcast receiving apparatus 10 of the present invention is connected to the conventional audio set 20 has been described. However, various displays are assumed on the assumption that the audio set itself is connected to a digital satellite broadcast tuner. When the form is prepared, that is, in the case of a digital satellite broadcast tuner connection compatible type, the function can be used. When the digital satellite broadcast receiver 10 is first connected to an audio set, it is unknown whether the audio set is compatible with a digital satellite broadcast tuner connection. Therefore, this is confirmed by the operation shown in the flowchart of FIG.
[0021]
That is, when it is confirmed in step S1 that the digital satellite broadcast receiver 10 is connected to an external device, it is determined in step S2 whether the external device is a digital satellite broadcast tuner connection compatible type. This determination can be made by detecting the last three bits of the communication data sent from the external device. If the type is compatible with a digital satellite broadcast tuner, the new format is adopted in step S3. If the type is not compatible with the digital satellite broadcast tuner, the old format is adopted in step S4. When the old format is adopted, the operation described in the embodiment of FIG. 2 is performed. On the other hand, when the new format is adopted, a display function and a control function of a channel number, a category number, and the like prepared in advance are used by a digital satellite broadcast tuner connection compatible audio set (not shown).
[0022]
In the above-described embodiment, the case where only the digital satellite broadcast receiver 10 is connected instead of the CD changer normally connected to the connector 32 of the audio set 20 has been described. It is also possible to connect a CD changer. In this case, the audio set 20 confirms whether the connected device is the digital satellite broadcast receiving device 10, the CD changer, or both by the communication immediately after the power is turned on. That is, when the communication is started, a format switching command is transmitted. If the format changes within a certain period of time, it is determined that the receiver is the digital satellite broadcast receiver 10, and if the format does not change, it is determined that the receiver is a CD changer.
[0023]
【The invention's effect】
As described above, according to the present invention, the connection means for connecting to the CD changer of the existing audio set is used, and the communication protocol performed between the CD changer and the audio set is used. Thus, it is possible to exchange control signals and the like between the existing audio set and a tuner for receiving digital satellite broadcasting. Therefore, only by connecting the digital satellite broadcast receiving apparatus via the CD changer connection means of the audio set, the operation means of the audio set performs tuning control of the tuner, and data obtained from the signal received by the tuner, That is, there is an excellent effect that a broadcast station name, a music piece name, a player name, and the like can be displayed as characters on the display unit of the audio set.
[Brief description of the drawings]
FIG. 1 is an external view showing a state in which a digital satellite broadcast receiving apparatus according to a preferred embodiment of the present invention is connected to an audio set. FIG. 2 is a block diagram showing an internal structure of the configuration in FIG. 2 is a flowchart showing the operation of the CPU in the digital satellite broadcast receiver shown in FIG.
10 Digital Satellite Broadcasting Receiver 12 Digital Satellite Broadcasting Tuner 12A, 29A Antenna 12B, 29B Feeder 14 Decoder 16, 46 CPU (Central Processing Unit)
18, 48 Interface (I / F)
Reference Signs List 20 Audio set 22 Disk switching knob 24 Track switching knob 26 Volume adjustment knob 27 Speaker 28 Display unit 30 Cable 32, 34 Connector (connection means)
40 AM / FM tuner 42 Multiplexer (MPX)
44 amplifier

Claims (3)

A digital satellite broadcast receiving apparatus connectable to an audio set having connection means for connecting to a CD changer via the connection means,
A digital satellite broadcast tuner that receives a digital satellite broadcast and selects a desired channel by an external control signal;
The connection means controls the digital satellite broadcast tuner by the operating means of the audio set, and displays the data obtained from the signal received by the digital satellite broadcast tuner as characters on a display section of the audio set. Interface means for performing communication between the audio set and the digital satellite broadcast receiving device via
Digital satellite broadcast receiving device. A digital satellite broadcast receiving apparatus connectable to an audio set having connection means for connecting to a CD changer via the connection means,
A digital satellite broadcast tuner that receives a digital satellite broadcast and selects a desired channel by an external control signal;
A decoder for creating data for performing predetermined character display in accordance with a digital satellite broadcast signal received by the digital satellite broadcast tuner;
As the external control signal, via the connection means, receives a signal from the audio set, and an interface means for transmitting the received digital satellite broadcast signal and the data to the audio set,
Digital satellite broadcast receiving device. Means for determining whether or not the audio set corresponds to the format for receiving digital satellite broadcasts, and, if the audio set corresponds to the format for receiving digital satellite broadcasts, the function thereof is used. Means for setting, and when the audio set does not correspond to the format for receiving digital satellite broadcasting, means for setting a signal generated by a predetermined selection means for the audio set as the control signal. Item 3. The digital satellite broadcast receiver according to item 1 or 2.

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