JPS6349955Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an FM multiplex data broadcasting receiver, and in particular, to an improvement for listening to the information content of a digital signal multiplexed into a stereo broadcast in the form of audio.

An FM multiplex data broadcasting system has been proposed as a new broadcasting system that multiplexes various information data with digital signals on stereo broadcasting. This FM multiplex data broadcasting can provide various information such as broadcasting station names, program names, weather forecasts, etc. simultaneously with stereo broadcasting using digital signals. The multiplexed digital signal is suitable for driving visually recognized display means such as a character display. Such visual information display is inappropriate for vehicle-mounted radio receivers from the viewpoint of safe driving.

The present invention was made in order to improve the inadequacy of the conventional technology as a car receiver.
It is characterized by being configured so that the information content of the multiplexed digital signal can be heard as audio. The present invention will be described below with reference to embodiments shown in the drawings. In FIG. 1, 1 is an antenna, 2 is an FM tuner, 3 is a stereo amplifier, 4 is a stereo speaker, 5 is a bandpass filter, 6 is a data signal demodulator, and 7 is a voice synthesis means and data reception control section. 71, an audio data ROM 72, a synthesis filter 73, and an audio amplifier 74. 8 is a key matrix, and 9 is an information audio speaker.

The FM multiplex data broadcast received by antenna 1 is
The FM tuner 2 separates the signal into a stereo audio signal and a digital signal extracted by a bandpass filter (57-76KHz passing filter) 5. A stereo audio signal is applied to one input terminal of the switch SW. On the other hand, the extracted digital signal is decoded into information data by the data signal demodulator 6, and the information data is given to the data reception control section 71, which gives commands to the audio data ROM 72 and the synthesis filter 73, and Necessary sounds stored in the data ROM 72 are taken out and sequentially applied to a synthesis filter 73, the synthesis filter 73 synthesizes a voice, and the synthesized audio signal is applied to the other input terminal of the switch SW.

Therefore, by appropriately switching the switch SW, the stereo audio signal or the synthesized audio signal corresponding to the information data is amplified by the audio amplifier 74 and amplified by the audio speaker 9. The information data multiplexed in the FM multiplex data broadcast includes various information contents such as weather forecasts, program names, and broadcasting station names, and the data is received from the key matrix 8 in order to output the information contents in a predetermined range as audio. Control unit 71
give commands to. For example, to listen to only the information content regarding the weather forecast, a command to that effect is given to the data reception control unit 71 from the key matrix 8, and only the information on the weather forecast is output as audio.

Note that the data reception control section 71 of the speech synthesis means 7
A microcomputer is used for this purpose, but if the FM tuner 2 is a receiver controlled by a microcomputer such as a PLL synthesizer, the computers for both the voice synthesis means 7 and the FM tuner 2 may function as one unit. .

As is clear from the above explanation, according to the present invention, since the multiplexed information content is amplified by voice, there is no need for the listener to visually recognize the information content. This has the advantage that information can be provided to the driver of the vehicle without compromising safety.

Further, since the input of the stereo amplifier can be appropriately switched to the output side of the FM tuner 22 or the synthesis filter 73 by the switch SW, there is no need to provide an amplifier dedicated to the synthesized audio signal, which is advantageous in terms of cost.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention. 2...FM tuner, 5...band pass filter,
6...Data signal demodulator, 7,7'...Speech synthesis means,
8...Key matrix.

Claims (1)

[Scope of utility model registration request] In the vehicle-mounted FM broadcast receiver, an FM broadcast receiving means for receiving FM broadcast waves and outputting an audio signal;
A bandpass filter extracts a digital signal representing predetermined information data multiplexed on the received FM broadcast wave, a data signal demodulator demodulates the information data from the digital signal, and responds to a command signal from the key matrix. a voice synthesis means for selecting information data of a predetermined range of content from the demodulated information data and outputting a corresponding audio signal; and a voice synthesis means for switching the audio signal from the voice synthesis means or the FM broadcast receiving means for driving a speaker. An FM multiplex data broadcasting receiver, characterized in that it is equipped with a switch for feeding an amplifier.