JPH0312700A - Voice reproducing device - Google Patents

Abstract

PURPOSE:To reduce the size and weight of the voice reproducing device by coupling a voice recording part and a voice reproduction part with each other through a 1st and a 2nd interface part and outputting a voice signal from the voice decoding part of the voice reproduction part. CONSTITUTION:The voice recording part 400 and voice reproduction part 900 are coupled with each other through the 1st and 2nd interface parts 300 and 800 and a control signal is sent from the control part 600 of the voice reproduction part 900 to the 2nd memory 200 of the voice recording part 400. Then the 2nd memory 200 receives it and transfers the control data to the control part 600 according to a specific rule on a 1st memory 100. Thus, the 1st and 2nd memories 100 and 200, voice decoding part 500, and control part 600 are composed of semiconductor ICs to realize the small-sized, lightweight voice reproducing device.

Description

[Detailed Description of the Invention] [Summary] The purpose of this invention is to provide a small and lightweight audio reproducing device that reproduces audio faithfully, while maintaining the faithful reproduction of audio, regarding portable audio reproducing devices such as cassette tapes. a first memory for storing data according to predetermined rules; a second memory for storing control data for reading audio data from the first memory; and a second memory connected to the first and second memories for recording audio data. The first
an audio recording unit having an interface unit; an audio decoding unit that inputs the audio data read from the first memory, adjusts the volume, and then decodes it into an analog signal; a control unit that outputs a control signal for specifying an address for reading audio data from the first memory and adjusting the volume to the audio decoding unit; and an audio recording unit and an audio playback unit connected to the audio decoding unit and the control unit and a second interface section for coupling the audio recording section and the audio reproduction section via the first and second interface sections. The audio signal is output from the audio decoding unit of the unit.

[Industrial application field]

The present invention relates to improvements in portable audio playback devices such as cassette tapes.

In recent years, the spread of compact discs (hereinafter referred to as CDs) has made it possible to play high-quality audio (music).
4 For portable use, smaller size and lighter weight are required.

Therefore, there is a need for a small and lightweight audio playback device that can reproduce audio faithfully.

[Prior art] Conventional audio playback devices (excluding those with audio memory)
, audio recording media (magnetic tape (MT), C
Recorded analog or digital audio signal data was read by driving the pickup (D, etc.) and tracing the pickup portion.

[Problem to be solved by the invention]

However, since the above-mentioned audio reproduction device has a driving part such as a motor, there is a limit to miniaturization of the audio recording medium.

Furthermore, as the drive unit becomes smaller, there is a problem in that the anti-vibration performance of the device and the fidelity of reproduced audio deteriorate.

Therefore, an object of the present invention is to provide a small and lightweight audio reproduction device while faithfully reproducing audio.

[Means to solve the problem]

The above problem is solved by the configuration of the device shown in FIG.

That is, in FIG. 1, 100 is a first memory that stores audio data according to predetermined rules.

200 is a second memory that stores control data for reading audio data from the first memory.

A first interface section 300 is connected to the first and second memories and is used to connect the audio recording section 400 and the audio reproducing section 900.

400 is an audio recording section, and the above 100.200 and 3
It consists of 00.

Reference numeral 500 denotes an audio decoding unit which inputs the audio data read from the first memory, adjusts the sound by digital control, and then decodes it into an analog signal.

Reference numeral 600 denotes a control unit that specifies an address for reading audio data from the first memory based on the control data read from the second memory and outputs a control signal for adjusting the volume to the audio decoding unit.

A second interface section 800 is connected to the audio decoding section and the control section, and is used to connect the audio recording section and the audio reproduction section.

900 is an audio playback section, and the above 500.600 and 8
It consists of 00.

By coupling the audio recording section and the audio reproducing section via the first and second interface sections, the audio signal is output from the audio decoding section of the audio reproducing section.

[For production]

In FIG. 1, an audio recording section 400 and an audio reproducing section 900
and are coupled via the first and second interface sections 300.800.

Then, a control signal is sent from the control section 600 of the audio reproduction section 900 to the second memory 200 of the audio recording section 400. The second memory 200 receives this and stores the start address, shift (jump) address, multiple pieces of music, etc. for reading out the audio data stored in the first memo January 00 according to a predetermined rule. Control data such as the start address of the song and the index address indicating the end are transferred to the control section 600.

The control unit 600 controls the first memory 10 based on the above data.
0 according to a predetermined rule, and sequentially outputs them to the first memory 100.

The audio data read from the first memo U100 is input to the audio decoding section 500, and after volume adjustment is performed, it is decoded into an analog audio signal and output.

By configuring the first and second memories 100 and 200, the audio decoding section 500, and the control section 600 using semiconductor ICs, it is possible to realize a small and lightweight audio reproduction device.

[Embodiment] FIG. 2 is a block diagram showing the configuration of an apparatus according to an embodiment of the present invention.

The same reference numerals indicate the same objects throughout the figures.

In FIG. 2, the audio data memory section 1 stores PC-encoded audio data according to a predetermined rule. (For example, it is stored sequentially in every second address.) In addition, the ID data memo 9 section 2 contains a start address for reading out the audio data stored in the audio data memory section 1, a shift (jump) address, and a plurality of control data such as an index address indicating the start address and end of a song, such as music, is stored in advance. The audio data memory section 1 and the 10-deck memory section 2 are constituted by ROM.

Now, the audio recording medium 4 and the audio reproducing device 9 are coupled via the respective increment parts 3 and 8.

The CPU included in the control unit 6 of the audio playback device 9
A control signal for reading the data stored in the ID data memo 9 part 2 from the ID data memo 9 part 2 (not shown) is sent to the ID data memo 9 part 2 of the audio recording medium 4 in synchronization with the clock output from the clock generating part 7. do. The ID data memo 9 section 2 receives this, reads out the above-mentioned control data for reading out the audio data stored in the audio data memory section 1, and transfers it to the control section 6.

Based on the above data, the CPU in the control section 6 determines an address for reading out the audio data stored in the audio data memory section 1 according to a certain rule, and sequentially outputs it to the audio data memory section 1. The audio data read from the audio data memory section 1 is input to the audio decoding section 5 via the interface sections 3 and 8, and after being subjected to sound UN conditioning by the control signal output from the CPU in the control section 6, it is converted into an analog signal. It is decoded and output as an audio signal.

For example, if the audio data has the same frame structure and encoding as a CD, and the storage capacity of the audio data memory section 1 is 54.
When it is set to 0 megabytes, the playback time is approximately 75 minutes. In this way, audio is played back.

Note that by making the above-mentioned audio data memory section 1, ID data memo 9 section 2, audio decoding section 5, control section 6, and clock generation section 7 using semiconductor ICs, a small and lightweight audio reproduction device can be realized. I can do it.

Further, as another embodiment, in the above-mentioned control section 6, if the shift of the address output from the audio data address section 1 is set to a negative value, the audio data can be reproduced in reverse.

Furthermore, by changing the encoding method for storing audio data in the audio data memory section 1 to a band compression method or the like, the number of bits of the audio data to be stored can be reduced and the playback time can be increased.

Also, by using FROM in the ID data memo 9 part 2 and adding the serial number of the audio playback device 9 to the stored ID information (this is written at the time of purchasing the audio recording medium 4),
The audio recording medium 4 can be made playable by only one audio playback device. As a result, it is possible to make it difficult to copy the content stored on the audio recording medium, thereby achieving stronger copyright protection.

[Effects of the Invention] As described above, according to the present invention, since there is no driving section or pickup section, it is possible to realize a portable audio reproduction device that is small and lightweight.

Furthermore, it is also possible to reproduce the audio in reverse, to lengthen the reproduction time, etc.

Furthermore, by adding the serial number of the audio playback device to the ID information, it is possible to make it difficult to copy the content stored on the audio recording medium, thereby achieving stronger copyright protection.

[Brief explanation of drawings]

FIG. 1 is a principle diagram of the present invention, and FIG. 2 is a block diagram showing the configuration of an apparatus according to an embodiment of the present invention. In the figure, 100 is the first memory, 200 is the second memory, and 300 is the first memory.
400 is the first interface section; 400 is the audio recording section; 500 is the audio decoding section; 600 is the control section; 800 is the second interface section; 900 is the audio reproduction section.

Claims (1)

[Claims] A first memory (100) that stores audio data according to predetermined rules, and a second memory (20) that stores control data for reading audio data from the first memory.
0), and a first interface section (300) connected to the first and second memories for coupling the audio recording section (400) and the audio reproduction section (900). (400), an audio decoding unit (500) that inputs the audio data read from the first memory, adjusts the volume, and then decodes it into an analog signal; A control unit (
an audio reproducing unit (90) having a second interface unit (800) connected to the audio decoding unit and the control unit and for coupling the audio recording unit and the audio reproducing unit;
0), by coupling the audio recording section and the audio reproducing section via the first and second interface sections, outputting an audio signal from the audio decoding section of the audio reproducing section. Characteristic audio playback device.