JPH0876791A - Digital audio broadcasting receiver - Google Patents

Abstract

PURPOSE: To provide a digital audio broadcasting receiver which simply records and reproduces music information only using the M/S identification data that are multiplex-transmitted for a digital audio broadcasting. CONSTITUTION: Radio waves from a digital audio broadcasting station are received by an antenna 1, converted to have an intermediate frequency by a tuner section 2, signal demodulated, error detected and corrected by a signal processing section 3. After these processes, the digital data are outputted to an M/S decoder 4 and an IC memory controlling circuit 6. The decoder 4 detects M/S identification data. An M/S data discriminating circuit 5 discriminates whether the currently received signal content is a music or a speech and the result of the discrimination is outputted to the circuit 6. The circuit 6 outputs the digital data from the section 3 to an audio section 11. Simultaneously, if the result of the circuit 5 is a music, an instruction is given to an IC memory 7 so that the digital data from the section 3 are recorded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a voice recording / reproducing system of a digital voice broadcasting receiver corresponding to a broadcasting system in which M / S identification data is multiplexed with a digital voice broadcasting signal.

[0002]

2. Description of the Related Art When recording a conventional analog FM audio broadcast or AM audio broadcast, whether the broadcast content is a speech part of commercials, news, announcements, etc. on the receiver side, or a music part of music, songs, etc. Or
It was unclear what kind of content was being broadcasted. Therefore, when recording a desired music portion, it is necessary to manually press the record key and then press the stop key when the music ends. Further, even in a receiver capable of recording at any time without any preparation such as pressing a recording key, an unnecessary portion of the speech portion is also recorded.

Therefore, the conventional receivers for FM audio broadcasting and AM audio broadcasting have a problem that they cannot perform stand-by reception according to program contents or automatically record desired programs.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems and utilizes M / S identification data multiplexed as additional information in a digital audio broadcast. An object of the present invention is to obtain a digital audio broadcasting receiver in which a music part is automatically recorded without pressing a recording key or a stop key of the receiver.

[0005]

A digital audio broadcast receiver according to the present invention includes an M / S decoder for extracting M / S identification data multiplexed in a received signal, an M / S data determination circuit, and a recording medium. Be prepared.

Further, only music is temporarily recorded in the IC memory.

Further, an IC provided with a store key and a numeric keypad
The digital voice is recorded in the memory or the digital voice is reproduced from the IC memory.

[0008]

In the digital audio broadcasting receiver according to the present invention, the M / S decoder fetches M / S identification data, and the M / S data judging circuit judges whether the content being broadcast is music or speech. Work to do.

Further, the digital audio broadcasting receiver according to the present invention works so as to record the audio received by the IC memory.

Further, in the digital audio broadcasting receiver according to the present invention, the digital audio is recorded in the IC memory by a predetermined operation of the store key and the numeric keypad, and the digital audio is reproduced from the IC memory by the operation of only the numeric keypad. work.

[0011]

【Example】

Example 1. 1 is a block circuit diagram showing a first embodiment of the present invention. In the figure, 1 is an antenna, 2 is a tuner section, 3 is a signal processing section, 4 is an M / S decoder, and 5 is an M / S.
A data determination circuit, 6 is an IC memory control circuit, 7 is an IC memory, 8 is a system control unit, 9 is a key group, 10 is a display unit, 11 is a voice unit, and 12 is a speaker.

Next, the operation of the first embodiment will be described. The antenna 1 receives a radio wave from a digital audio broadcasting station, the tuner unit 2 drops it to an intermediate frequency, and the demodulation level is detected. The digital data after signal demodulation, error detection, and error correction in the signal processing unit 3 is transferred to the M / S decoder 4 and the IC.
Output to the memory control circuit 6. M / S decoder 4 is M /
Upon detecting the S identification data, the M / S data determination circuit 5 receiving the output determines whether the content currently received is music or speech, and outputs the result to the IC memory control circuit 6. . The IC memory control circuit 6 outputs the digital data from the signal processing unit 3 to the audio unit 11, and also outputs the digital data from the signal processing unit 3 to the IC memory 7 if the result of the M / S data determination circuit 5 is music. Control to record data.

The audio section 11 audio-decodes the input digital data to generate digital audio data. Furthermore, a D / A converter for converting digital audio data into analog audio data,
It is composed of an amplifier for amplifying sound, and the speaker 12 generates sound.

Next, in order to reproduce the voice recorded in the IC memory, the system control unit 8 detects that the IC memory reproduction key of the key group 9 is pressed, and the IC memory control circuit 6 is notified of it. By inputting, the IC memory control circuit 6 reads digital data from the IC memory 7 and outputs the digital data to the audio unit 11.

The operation of the main part will be described in a little more detail with reference to FIG. FIG. 2 is a block diagram of a portion related to recording / reproduction of digital data to / from the IC memory 7. The IC memory control circuit 6 and the IC memory 7 usually include an address bus, a data bus, a write signal (WR),
It is connected by a read signal (RD) and a chip select signal (CS). The signal from the M / S data determination circuit 5 is
For example, if the music part is "1" and the speech part is "0", the IC memory control circuit 6 automatically inputs the input digital data to the IC memory 7 when the signal which is the music part of "1" comes. Record. That is, I
A series of operations for outputting an address to the address bus of the C memory 7, outputting digital data to the data bus, outputting a chip select signal and a write signal, and writing to a specified address of the IC memory 7 This is repeated until the signal from 5 becomes "0".

When the IC memory control circuit 6 receives the IC memory reproduction signal from the system controller 8, it outputs an address to the address bus of the IC memory 7, outputs a chip select signal and a read signal, and outputs the data bus. The above digital data is read from the designated address of the IC memory 7 and output to the voice unit 11.

Example 2. In FIG. 1, the key group 9 is provided with a store key and a ten-key pad, and a digital voice is recorded in the IC memory 7 corresponding to the ten-key pad by a predetermined operation or a digital voice is reproduced from the IC memory 7. About the audio broadcasting receiver,
This will be described with reference to FIGS. 3, 4, and 5. FIG. 3 is a diagram showing a store key and a numeric keypad. In the figure, 30 is a store key, 50 is a numeric keypad, 31 is 1 key, 32 is 2 key, 33 is 3 key, 34 is 4 key, 35 is 5 keys,
36 for 6 key, 37 for 7 key, 38 for 8 key, 39 for 9
The key, 40 is the 10 key.

FIG. 4 is a timing chart of the received voice signal and the M / S identification data, 41 is the received voice and 42 is the M / S identification data. If the "1" portion of the M / S identification data 42 is music, the received voice 41 is a,
It can be determined that b, c, d, and e are music. At time t1, digital data of music b is written in the IC memory 7. If you like the song b at time t2 and want to hear it again later,
First, the store key 30 is pressed. The system control unit 8 detects it and displays it on a display such as an LED to inform that the store key is pressed by the display 10.
Then, by pressing any one of the ten keys 50, the music b is stored in that key.

FIG. 5 is a diagram showing a recording mode in the IC memory 7. For example, by pressing the 1 key 31, the music b is stored in the 1 key 31. Even if the 1 key 31 is pressed, the music b is recorded in the IC memory 7 up to the point where the M / S identification data at time t3 becomes "0". When the recording is completed, the display on the display unit 10 is stopped and the next input of the store key 30 is waited for. From time t4, the IC memory 7
The digital data of the music c is written in a portion different from the portion in which the music b is written. However, if the store key 30 is not pressed, from time t5, the digital data of the music d is written in the portion of the music c previously written, and the music c written in the IC memory 7 remains. , Will not be overwritten.

Similarly, at time t6, the store key 30
The music d is stored in the IC memory 7 by pressing and then the 2 key 32. As a result, IC
In the memory 7, music b and d are recorded as shown in FIG. Furthermore, if the 2 key 32 is pressed without pressing the store key, the system control unit 8 considers that the reproduction of the IC memory 7 is meant, and the data of the music d is read from the IC memory 7 and reproduced. .

[0021]

As described above, according to the present invention, since the M / S identification data multiplexed in the digital audio broadcast is used for recording, the music part and the speech part are judged by the receiver side. Yes, you can automatically record only the music part.

Further, since the key operation for starting and stopping the recording at the time of recording is unnecessary, a good effect can be obtained from the viewpoint of safety when considering the case of developing for a vehicle.

Further, since the music is stored in the IC memory by the store key and the ten-key while receiving the music as voice, recording and reproduction can be performed by a simple key operation.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a digital audio broadcast receiver according to a first embodiment of the present invention.

FIG. 2 is a block diagram of a portion related to recording / reproduction of digital data to / from an IC memory according to the first embodiment.

FIG. 3 is a diagram showing a store key and a numeric keypad according to a second embodiment of the present invention.

FIG. 4 is a diagram showing received voice and M / S identification data.

FIG. 5 is an image diagram in which music is recorded in an IC memory.

[Explanation of symbols]

1 antenna, 2 tuner section, 3 signal processing section, 4
M / S decoder, 5M / S data determination circuit, 6 IC memory control circuit, 7 IC memory, 8 system control unit,
9 key groups, 10 indicators, 11 voice parts, 12 speakers.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location H04B 1/20

Claims (3)

[Claims] 1. An M / S decoder for extracting music / speech (hereinafter referred to as "M / S") identification data multiplexed in digital audio broadcasting, and an M / S data determination for determining the contents of the M / S identification data. A digital audio broadcast receiver comprising a circuit, a recording medium for recording digital audio, and a control circuit for recording digital audio on the recording medium. 2. A recording medium for recording digital voice is I
2. The digital audio broadcasting receiver according to claim 1, wherein the C memory is used and only the music information is temporarily recorded in the IC memory by the M / S data determination circuit. 3. A store key and a ten-key pad are provided, and digital voice is recorded in or reproduced from the IC memory corresponding to the ten-key pad by a predetermined operation. Digital audio broadcast receiver.