JPH06153165A - Satellite broadcast receiver - Google Patents

Abstract

PURPOSE:To provide the receiver in which other signal than a signal received by an internal BS reception circuit is fed to a built-in MN converter especially and a MUSE broadcast is recorded with respect to the satellite broadcast receiv er (BS tuner) incorporating a MUSE-NTSC converter (MN converter). CONSTITUTION:When an internal BS reception circuit 1 does not receive a MUSE broadcast, a microcomputer 9a selects switch circuits 21, 22 to the position of an external side to apply a MUSE broadcast received by an external tuner to a built-in MN converter 3 and a switch circuit 24 to the position of the MUSE broadcast, then an output of the MN converter 3 is outputted again externally.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a satellite broadcast receiver (hereinafter also referred to as BS tuner) having a MUSE-NTSC converter (hereinafter also referred to as MN converter) built therein.
The present invention can supply a signal different from the signal received by the internal BS receiver circuit to the built-in MN converter.
It is an object of the present invention to provide a satellite broadcast receiver that enables back recording of USE broadcasts.

[0002]

2. Description of the Related Art Currently, three types of satellite broadcasting are being performed using a broadcasting satellite (BS). Standard system (NTSC system) free broadcasting (hereinafter referred to as BS broadcasting), scrambled pay NTSC system broadcasting (hereinafter referred to as BS pay broadcasting), and high-definition TV signal MUSE system broadcasting ( (Hereinafter referred to as MUSE broadcasting). To watch programs on BS pay broadcasting, BS
A BS pay decoder for descrambling is required in addition to the tuner, and an MN converter or MUSE decoder is required in addition to the BS tuner in order to watch a program by MUSE broadcasting.

A conventional BS tuner having a built-in MN converter has a structure as shown in FIG. The detection output of the BS receiving circuit 1 is input to the BS signal processing circuit 2 and the built-in MN converter 3. The detection output is also output from the detection output terminal 4 so that the BS tuner can be connected to the external BS pay decoder 11.

A bit stream signal is output from the BS signal processing circuit 2 and supplied to the BS pay decoder 11 via the bit stream output terminal 5. Further, the BS signal processing circuit 2 performs de-emphasis, dispersal removal, etc. on a signal of a general BS broadcast, and outputs a video signal and an audio signal. The output is input to the switch circuit 8.

The BS signal processing circuit 2 detects the presence or absence of pay broadcasting, and the pay broadcasting discrimination signal is input to the microcomputer 9.

The decoded video signal and audio signal output from the external BS pay decoder 11 are input to the switch circuit 8 via the return terminal 6.

The detection output signal input to the MN converter 3 is converted to an NTSC signal if the signal is a MUSE signal, and the converted NTSC signal (video signal and audio signal) is input to the switch circuit 8. . The MN converter 3 determines whether or not it is a MUSE signal, and
The discrimination signal is supplied to the microcomputer 9. Also, the MN converter 3 outputs a keyed AFC output to the BS reception circuit 1 (hereinafter referred to as AF
C output). The AFC output controls the center frequency of the carrier wave that serves as a reference when the BS receiver circuit 1 selects a channel.

The microcomputer 9 is
Whether the BS broadcast, the BS pay broadcast, or the MUSE broadcast is detected based on the supplied pay broadcast discrimination signal and MUSE discrimination signal, and a switch switching signal is supplied to the switch circuit 8. The switch circuit 8 switches and outputs a signal according to the detected broadcast mode, and supplies a video signal and an audio signal to the main body side of the TV receiver or the like and the external output terminal 7.

[0009]

As described above, the MN converter 3 built in the BS tuner is
The detection output inside the S tuner is used. Therefore, M
The N converter 3 cannot be used for the detection output of the external BS tuner. Therefore, if you want to record a MUSE broadcast by connecting an ordinary NTSC type BS tuner built-in VTR (without a built-in MN converter) to this BS tuner, be sure to use the MUSE in the BS receiver circuit 1 inside the BS tuner.
You have to receive the station, this BS tuner
It was impossible to record a MUSE broadcast on a VTR while receiving other broadcasts (called backing).

The problem to be solved by the present invention is to provide a satellite broadcasting receiver capable of supplying a signal different from the signal received by the internal BS receiving circuit to a built-in MN converter and enabling back-recording of MUSE broadcasting. The question is what kind of measures should be taken.

[0011]

In order to solve the above problems, the present invention provides

It has three types of terminals, a detection output terminal, a bit stream output terminal, and a return input terminal connected to an external pay broadcasting decoder.

A built-in high-definition signal demodulation circuit for switching between standard broadcast, high-definition broadcast, and pay broadcast received and demodulated and outputting in accordance with a discrimination signal from a discrimination circuit for discriminating the received broadcast. In the satellite receiver,

A detection input terminal,

A bitstream input terminal,

AFC output terminal,

A first switch for switching between a first detection signal supplied from an internal satellite broadcast receiving circuit and a second detection signal coming from the detection input terminal and outputting the signal to the high-quality signal demodulation circuit. Circuit,

The AFC output of the high-quality signal demodulation circuit is
A second switching circuit for switching and outputting to the internal satellite broadcast receiving circuit and the AFC output terminal;

The first detection signal and the second detection signal are switched and output to the detection output terminal, and the first bit stream signal supplied from an internal satellite broadcast signal processing circuit and the bit A third switching circuit for switching between a second bit stream signal coming from a stream input terminal and outputting the signal to the bit stream output terminal;

The output of the high-quality signal demodulation circuit, the decode signal output from the external pay-broadcast decoder coming from the return input terminal, and the output of the internal satellite-broadcast signal processing circuit are switched. A fourth switching circuit for outputting to an external output terminal,

A detector for detecting whether or not the external satellite broadcast receiver and the external pay broadcast decoder are connected, and outputting a detection signal.

A satellite broadcast receiver characterized by comprising a control circuit for controlling the first to fourth switching circuits according to the discrimination signal, the detection signal, and setting information from the outside. To do.

[0023]

EXAMPLE FIG. 1 shows an example. The BS tuner of this embodiment is incorporated in the TV receiver. In addition,
The same parts as those of the conventional example are designated by the same reference numerals, and a specific description of the parts will be omitted.

The present BS tuner has four switch circuits 21 to 24 and 3 in comparison with the conventional example so that the built-in MN converter 3 can be operated by the detection output outside the BS tuner.
Two terminals 25 to 27 are added so that each switch circuit can be controlled by the microcomputer 9a.
The three terminals are a detection input terminal 25, a bit stream input terminal 26, and an AFC output terminal 27.

The switch circuit 21 provided on the input side of the MN converter 3 has a detection output (VTR) supplied from an external VTR 12 with a built-in BS tuner via a detection input terminal 25.
12 BS tuner detection output) is input to the MN converter 3 or the detection output from the internal BS reception circuit 1 is M
It is possible to select whether to input to the N converter 3.

The switch circuit 23 provided in front of the terminals 4 and 5 for outputting a signal to the external BS pay decoder 11 outputs the detection output supplied from the external VTR 12 or outputs from the internal BS receiving circuit 1. It is possible to select whether to output the detection output. Further, the switch circuit 23 is
The bit stream output supplied from the external VTR 12 via the bit stream input terminal 26 is output,
It is possible to select whether to output the bit stream output from the internal BS signal processing circuit 2.

The switch circuit 22 outputs the AFC output from the internal MN converter 3 to the internal BS receiving circuit 1 as an AF signal.
C or A to the external VTR12 BS tuner
Select whether to apply FC. A to the external VTR 12
The AFC signal is supplied via the FC output terminal 27.

The switch circuit 24 is the BS signal processing circuit 2.
BS broadcast video and audio signals output from the BS
Video signal and audio signal of BS pay broadcasting output from pay decoder 11 or MU output from MN converter 3
By switching between the SE broadcast video signal and audio signal, an external V
It outputs to TR12 via the external output terminal 7.

The microcomputer 9a automatically switches between the switch circuits 21 to 24 and the switch circuit 8 according to the following user setting conditions, connection conditions, and receiving conditions.

(B) User settings:

1. Both BS pay decoder 11 and MN converter 12 are switched to the VTR 12 side (VTR 12
When the BS pay decoder 11 / MN converter 12 is used for the signal received by the BS tuner on the side).

2. State in which only the MN converter 12 is switched to the VTR side.

3. State in which only the BS pay decoder 11 is switched to the VTR side.

4. Normal viewing of the TV receiver.

These states can be arbitrarily selected by the user with a remote controller or the like, and the information is transmitted to the microcomputer 9a. With this setting, in the case of 1. above, the switch circuit 2
1, 2, 23 are all set on the VTR side. In the case of 2. above, the switch circuits 21 and 22 are set to the VTR side, and the switch circuit 23 is set to the TV side (that is, the BS tuner side of this embodiment). In the case of 3. above, only the switch circuit 23 is on the VTR side, and the switch circuit 2
1, 22 are set on the TV side.

(B) Connection condition:

1. Whether or not the connected VTR has a built-in BS tuner (that is, whether or not the BS tuner is connected) is determined by whether or not an external connector is connected to the bitstream input terminal 26.

2. Whether or not the BS pay decoder is connected is determined by whether or not the external connector is connected to the return input terminal 6.

These detections are performed by the connection detection circuits 31, 32.
The detection information is transmitted to the microcomputer 9a. An example of the connection detection circuits 31 and 32 is shown in FIG. In this example, the presence / absence of connection is electrically determined by a mechanical switch (a well-known example). The presence / absence of connection is detected to prevent a situation in which neither video nor audio is output if the switch circuit is automatically switched to the external device side when the external device is not connected.

(C) Reception conditions:

1. Whether the BS broadcast being received is charged or not.

2. Whether or not MUSE broadcasting is being received.

These detections are performed in the same manner as in the conventional method, and the BS
The BS signal processing circuit 2 is used for pay / free of broadcasting, and the MN converter 3 is used for the presence / absence of MUSE broadcasting.

In the present embodiment, each switch circuit is controlled by the microcomputer 9a so that the output operation shown in FIG. 4 (described later) can be performed under the above three conditions. This allows the newly provided switch circuit 24 to output video and audio signals independent of the TV side from the output terminal 7 that outputs a signal for the external VTR 12.

The control first detects which device is connected to the TV receiver main body (that is, the BS tuner) according to the connection condition. Next, read the setting conditions of the user, determine what kind of usage the user wants to use, switch the switch circuit to a mode that can be selected within the mode suitable for that condition and the receiving state at that time, and perform the predetermined operation I'm trying to do.

For example, VTR 12 and B with a built-in BS tuner
Consider a case where the S pay decoder 11 is connected.
As shown in N0.2 of FIG. 4, the MN converter 3 with a built-in TV
The switch circuits 21, 22, and 23 of FIG. 1 are switched to the VTR side so that the external BS pay decoder 11 and the external BS pay decoder 11 can be used by the signal received by the BS tuner on the VTR 12 side.
Then, the signal of the detection output of the VTR is input to the MN converter 3 incorporated in the TV, and when the MN converter 3 detects the MUSE broadcast, the video output of the MN converter 3 is returned to the VTR side as a return signal through the switch circuit 24. , VTR is ready for recording.

If the MN converter does not detect the MUSE signal, the signal of the detection output of the VTR is input to the BS pay decoder 11, and the decoded signal is used as the return signal, as shown in NO.1 of FIG. It is output to the VTR side through the switch circuit 24.

In both cases of NO.1 and N0.2, the BS broadcast received by the BS receiver circuit 1 inside the TV is output by the switch circuit 8 to the TV receiver main body side (in FIG. BS and shown). Therefore, while watching free BS broadcasting on the TV receiver itself, BS pay broadcasting or M
Operations such as recording (back-recording) of USE broadcasting become possible.

Further, by renting out only the MN converter 3 to the VTR side, as shown in NO.4 of FIG.
While watching S pay broadcasting on the TV receiver body, M on the VTR
Operations such as recording (back-recording) of USE broadcasting become possible. On the contrary, it is also possible to record (backplay) the BS pay broadcast on the VTR while watching the MUSE broadcast on the TV receiver main body.

FIG. 3 collectively shows the combinations that can be endorsed. In the figure, the VTR alone means that only the BS tuner on the VTR side is used without using the MN converter or the BS pay decoder.

It should be noted that monitor recording (recording the broadcast viewed on the TV receiver main body) is of course possible in all cases.

Here, the present invention can also be applied to MUSE pay broadcasting by adding a terminal for the MUSE pay decoder and performing the same processing as described above. In addition, the present invention is a CS
It may be a receiver for (communication satellite) broadcasting, or the MN converter may be a MUSE decoder.

Furthermore, the BS pay broadcast converter may be built in and the connection detection circuit 32 may be omitted.

[0054]

As described above, the satellite broadcasting receiver according to the present invention is

(A) High-definition broadcasting (for example, MUSE broadcasting)
High-definition broadcast received by an external tuner can be output via the built-in high-definition signal demodulation circuit except when receiving the standard broadcast. Etc. are possible,

(B) Except when receiving a pay broadcast,
Since the pay broadcast received by the external tuner can be output through the pay broadcast decoder, the pay broadcast can be backed up while receiving the free broadcast, which is very convenient.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

FIG. 2 is a diagram showing an example of a connection detection circuit.

FIG. 3 is a diagram showing combinations that can be endorsed.

FIG. 4 is a diagram showing a relationship between each condition and an output.

FIG. 5 is a diagram showing a conventional example.

[Explanation of symbols]

 1 BS receiver circuit 2 BS signal processing circuit 3 MN converter 4 detection output terminal 5 bit stream output terminal 6 return input terminal 7 external output terminal 8, 21-24 switch circuit 9a microcomputer 11 BS pay decoder 12 BS tuner built-in VTR 25 detection input Terminal 26 Bit stream input terminal 27 AFC output terminal 31, 32 Connection detection circuit (detection device)

Claims (2)

[Claims] 1. A standard broadcast, a high-definition broadcast, and a pay broadcast which have three types of terminals, a detection output terminal, a bit stream output terminal, and a return input terminal, which are connected to an external pay broadcasting decoder. In a satellite broadcast receiver with a built-in high-definition signal demodulation circuit that switches and outputs according to the discrimination signal from the discrimination circuit that discriminates the received broadcast, a detection input terminal, a bitstream input terminal, an AFC A first detection signal supplied from an internal satellite broadcast receiving circuit and a second detection signal coming from the detection input terminal are switched and output to the high-quality signal demodulation circuit. A switching circuit; a second switching circuit for switching and outputting the AFC output of the high-quality signal demodulation circuit to the internal satellite broadcast receiving circuit and the AFC output terminal; and the first switching circuit. The detection signal and the second detection signal are switched and output to the detection output terminal, and the first bit stream signal supplied from an internal satellite broadcast signal processing circuit and the bit stream input terminal are input. Second
Third switching circuit for switching the bit stream signal of the above and outputting to the bit stream output terminal, the output of the high quality signal demodulating circuit, and the output from the external pay broadcast decoder coming from the return input terminal. A fourth switching circuit for switching the decoded signal and the output of the internal satellite broadcast signal processing circuit to output to the external output terminal, an external satellite broadcast receiver and the external pay broadcast decoder are connected. A detection device that detects whether or not there is an output and outputs a detection signal; and a control circuit that controls the first to fourth switching circuits according to the determination signal, the detection signal, and setting information from the outside. Satellite receiver characterized by being provided. 2. A discriminating circuit for discriminating a received broadcast from a standard broadcast, a high-definition broadcast and a pay broadcast which are received and demodulated by incorporating a pay broadcast decoder and a high-definition signal demodulation circuit. In a satellite broadcasting receiver that switches and outputs according to a discrimination signal, a detection input terminal, a bit stream input terminal, an AFC output terminal, a first detection signal supplied from an internal satellite broadcasting receiving circuit, A first switching circuit for switching between a second detection signal coming from a detection input terminal and outputting to the high-quality signal demodulation circuit, and an AFC output of the high-quality signal demodulation circuit for the internal satellite broadcast receiving circuit. And a second switching circuit for switching between the AFC output terminal and the AFC output terminal, and switching between the first detection signal and the second detection signal for output to the pay broadcast decoder and at the same time the internal guard. A third switching circuit for switching between the first bit stream signal supplied from the star broadcast signal processing circuit and the second bit stream signal coming from the bit stream input terminal and outputting to the pay broadcast decoder; A fourth switching circuit for switching the output of the high-quality signal demodulation circuit, the decoded signal output from the pay broadcast decoder, and the output of the internal satellite broadcast signal processing circuit to output to an external output terminal. , Detects whether an external satellite broadcast receiver is connected,
A detection device that outputs a detection signal, and a control circuit that controls the first to fourth switching circuits according to the determination signal, the detection signal, and setting information from the outside are provided. Satellite receiver.