JP2519208Y2 - Satellite receiver - Google Patents

Description

[Detailed description of the device]

[0001]

This invention relates to a satellite broadcast receiver.

[0002]

2. Description of the Related Art Conventionally, satellite broadcast receivers have the advantage that they can receive clear images without ghosts and can receive high-quality sound by PCM (pulse code modulation). On the other hand, a relatively expensive antenna and SHF band are used to receive weak radio waves from satellites.
A converter is required to convert to the F band, which is expensive for its function. Therefore, there has been a demand for a satellite broadcast receiver that makes more effective use of satellite broadcasts and has a further added value.

[0003]

The present invention has been made in view of the above points, and a plurality of channels are broadcast and PCM (Pulse Code Modulation) is performed.
In order to effectively use the satellite broadcast radio waves, which are the audio signals from, the high-quality digital recording of not only the audio part but also the audio part of other channels is recorded at the same time as viewing the image. It is an object of the present invention to provide a satellite broadcasting receiver that is capable and has a good function.

[0004]

According to the present invention, in a satellite broadcast receiver, a plurality of tuners and demodulation units are provided so that a plurality of reception channels can be received simultaneously, and high quality audio from PCM from satellite broadcasts is provided. A channel having a signal is selected, and a digital demodulated signal or an analog demodulated signal is digitally recorded by DAT (digital audio pre-coder) or the like to effectively use satellite broadcasting.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows the overall structure of a satellite broadcast receiver according to an embodiment of the present invention. That is,
An antenna 1 receives an electric wave for TV broadcasting from a broadcasting satellite (not shown), the SHF signal is converted into a UHF signal by an ODU (outdoor unit) 2, and is input to a satellite receiver 3. . This satellite receiver 3
Is equipped with two tuners 4 and 5 and can receive two channels at the same time. The tuners 4 and 5 are provided with a reference frequency required for operation from a reference oscillator 6 such as a crystal oscillator. The signal of the channel selected by the tuner 4 is demodulated by the FM demodulator 7 and sent to the video / audio separation unit 8. Here, the video signal and the audio signal are separated, and the video signal passes through the filter 9,
TV receiver 11 that can input video from the video output terminal 10
Sent to. On the other hand, the audio signal separated by the video / audio separation unit 8 is sent to the decoder 12 and is divided into an analog audio signal and a digital audio signal and output. The analog audio signal is output to the TV receiver 11 via the TV audio output terminal 13, and is also branched and sent to the analog audio channel switch (hereinafter abbreviated as analog switch) 14. The digital audio signal output from the decoder 12 is output to a digital audio channel switch (hereinafter abbreviated as digital switch) 19. Here, the digital bit stream of PCM from the decoder 12 is
32 kbps for A mode with many audio channels
In the case of high quality B mode, the data of 48 kbps is
Data transmission rate.

On the other hand, the signal of the channel selected by the tuner 5 is demodulated by the FM demodulator 16 and sent to the voice separation unit 17. The audio separation unit 17 separates the audio part of the demodulated signal. The separated audio signal is sent to the decoder 18 and divided into an analog audio signal and a digital audio signal and output. Then, the analog audio signal is input to the analog switching device 14, and the digital audio signal is input to the digital switching device 15.

The analog switching unit 14 is a decoder 1
The analog audio signals given from 2, 18 are switched and output to the analog audio output terminal 19. Similarly, the digital switching device 15 switches the digital audio signals given from the decoders 12 and 18 to output the digital audio output terminal 2
Output to 0. Then, the analog audio output terminal 19 and the digital audio output terminal 20 have digitally recordable D
AT21 is connected. The DAT 21 performs digital recording by switching between an analog input mode and a digital input mode according to an input signal.

As described above, by providing the two tuners, the audio portion of the channel selected by the tuner 4 can be recorded while listening to the image, and the tuner 5 allows the tuner portion to be recorded. By selecting a channel other than the channel selected in 4, it is possible to digitally record the audio part of another channel by the DAT 21 regardless of the TV viewing. Further, since the audio output is divided into the analog output and the digital output, recording outside the receiver is performed by the DAT 21 or the like capable of digital recording, and high quality voice recording is possible.

[0009]

As described in detail above, according to the present invention, the number of receivable channels of the satellite broadcast receiver is increased,
By providing an output terminal for digital audio, DAT
It is possible to perform high-quality digital recording by selecting the channel, etc., and to select and record the channel regardless of the visual perception of the image, improving the function of the satellite broadcasting receiver and transmitting information from the broadcasting satellite. There is a great effect that can be used more effectively.

[Brief description of drawings]

FIG. 1 is a block diagram showing an overall configuration of a satellite broadcast receiver according to an embodiment of the present invention.

[Explanation of symbols]

1 ... Antenna, 2 ... ODU (outdoor unit), 3
... Satellite broadcast receiver, 4,5 ... Tuner, 6 ... Crystal oscillator, 7,16 ... FM demodulator, 8 ... Video and audio separation unit, 9 ...
Filter, 10 ... Video output terminal, 11 ... TV receiver, 1
2, 18 ... Decoder, 13 ... TV audio output terminal, 14 ...
Analog voice channel switcher, 15 ... Digital voice channel switcher, 17 ... Voice separation unit, 19 ... Analog voice output terminal, 20 ... Digital voice output terminal, 21 ...
DAT (Digital Audio Pre-coder).

Claims (1)

(57) [Scope of utility model registration request] 1. A first tuner for inputting a satellite broadcast signal obtained by frequency conversion of an electric wave received by a satellite broadcast receiving antenna by an outdoor unit and selecting a signal of a predetermined channel, A first demodulator that demodulates a signal selected by the first tuner; an audiovisual separation unit that separates a video signal and an audio signal from the signal demodulated by the first demodulator; A filter for inputting the video signal separated by the separation unit, a video output terminal for sending the video signal that has passed through the filter to a receiver, and an audio signal separated by the video / audio separation unit as an analog audio signal. First to output digital audio signals separately
Decoder, an audio output terminal for sending an analog audio signal output from the first decoder to the receiver, the first tuner obtained by the satellite broadcast receiving antenna and the outdoor unit The same signal as the satellite broadcast signal input to the first tuner is input to the first tuner.
A second tuner for selecting a signal of a channel different from the channel selected by the tuner; a second demodulator of the same type as the first demodulator for demodulating the signal selected by the second tuner; An audio separation unit that separates the audio signal from the signal demodulated by the second demodulator; a second decoder that outputs the audio signal separated by the audio separation unit into an analog audio signal and a digital audio signal; The analog audio signal from the first decoder and the second audio signal
An analog audio signal from the decoder for selectively outputting an analog audio channel switch, and an analog audio output terminal for sending the analog audio signal output from the analog audio channel switch to an external device. A digital audio signal from the first decoder and the second audio signal
A digital audio channel switch for selectively outputting the digital audio signal from the decoder of, and a digital audio output terminal for sending the digital audio signal output from the digital audio channel switch to an external device. A satellite broadcast receiver comprising: