KR940008879B1 - Audio system in ic memory card - Google Patents

Abstract

The system provides an IC memory card audio system including a ROM as a storing media of audio source. The system comprises: a control pannel unit, a central processing unit, an address counter generating address signal receiving from CPU, an IC memory card unit outputing data from the address counter, a signal processing unit generating channel signal from parity assurance unit, a control data storing unit generating control signal to the CPU, a D/A converter receiving signal from the signal processing unit, a line amplifing unit and a speaker.

Description

Integrated Circuit (IC) Memory Card Audio System

1 is a block diagram of an integrated circuit memory card audio system.

2 is another exemplary embodiment of the present invention.

3 is a block diagram of a compression coding / decoding unit.

* Explanation of symbols for main parts of the drawings

1: integrated circuit memory card part 2: parity check part

3: address counter section 4: signal processing section

5: control data storage unit 6: central processing unit

7: D / A converter 8: line amplifier

9: speaker part 10: control panel part

21: compression coding / uncoding part

The present invention relates to an audio system using an integrated circuit memory card composed of a ROM as a sound source medium.

Due to the recent development of audio-related technology for reproducing original sound, commercially available CD player (Digital Disc Tape Player, CDP) and DAT (Digital Audio Tape), which is a high-tech product using digital data as a sound source, are commercialized It is becoming. By the way, CDP or DAT using digital data as a sound source can reproduce natural sound with noise reduction and minimization of signal distortion. However, first, they are limited in miniaturizing the product size because the basic operation principle is based on mechanical mechanism. Second, in the case of CDP, the impact is very weak due to the mechanism construction mechanism. Third, CDP and DAT provide sound source in physical quantity, so complex signal processing system such as error correction is required for original data extraction. Fourth, CD bending or scratching as a sound storage medium is weak to mechanical damage. , DAT has a problem that the durability as a sound source due to the friction of the tape and the head of the player is inferior.

Accordingly, an object of the present invention is to provide an integrated circuit (IC) memory card audio system using an integrated circuit memory card having a ROM embedded therein as a sound source storage medium.

In order to achieve the above object, the present invention provides a control panel unit by a user's mechanical operation, a central processing unit receiving a central processing control signal by an operation of the control panel unit, and receiving a signal from the central processing unit to generate an address signal. An integrated circuit memory card unit for outputting data by inputting an address counter unit, an output from the address counter unit, a parity confirmation unit for outputting parity confirmation data by inputting an output of the integrated circuit memory card unit, and the parity confirmation unit A signal processor for receiving the output from the signal processor, a control data storage unit for receiving the output from the parity checker and the central processor, and generating a control signal to the central processor, and receiving a signal from the signal processor. An a conversion section and an amplifying signal converted by the D / A conversion section. An audio system including an amplifier unit and a speaker unit for generating sound waves by receiving the output of the line amplifier unit, the audio system including an integrated circuit memory card storing compressed coded sound source data as a sound source medium includes: a control panel unit operated by a user's mechanical operation; A central processing unit which receives a central processing control signal by operation of the control panel unit, an address counter unit which receives a signal from the central processing unit to generate an address signal, and an integrated circuit memory which outputs data by inputting the output from the address counter A parity checking unit for outputting parity confirmation data by inputting a card unit, an output of the integrated circuit memory card unit, a compression coding / decoding unit for receiving a coded output from the parity checking unit and generating a decoded output signal, the compression unit Channel with coding / decoding output signal as input A signal processing unit for generating a call, a control data storage unit for receiving outputs from the parity checking unit and the central processing unit and generating a control signal to the central processing unit, a D / A conversion unit for receiving a signal from the signal processing unit, and the D And a line amplifier for amplifying the signal converted by the / A converter, and a speaker unit for generating sound waves by receiving the output of the line amplifier.

Hereinafter, with reference to the accompanying drawings will be described in detail the present invention. 1 is a block diagram of an integrated circuit memory card audio system, in which 1 is an integrated circuit memory card unit, 2 is a parity check unit, 3 is an address counter unit, 4 is a signal processing unit, 5 is a data storage unit, 6 is A central processing unit, 7 denotes a D / A converter, 8 denotes a line amplifier, 9 denotes a speaker, and 10 denotes a control panel.

As shown in the figure, a central processing unit 6 which receives a central processing control signal by an operation of the control panel unit 10, and an address counter unit 3 which receives a signal from the central processing unit 6 and generates an address signal. ), An integrated circuit memory card unit 1 that outputs data by inputting the output from the address counter unit 3, and outputs parity check data by using an output of the integrated circuit memory card unit 1 as an input. Parity check unit 2, the signal processing unit 4 receives the output from the parity check unit 2 to generate a channel signal, the parity check unit 2 and the output from the central processing unit 6 By the control data storage section 5 which generates a control signal to the central processing section 6, the D / A converter section 7 receiving the signal from the signal processor section 4, and the D / A converter section 7 A line amplifier 8 for amplifying the converted signal; The speaker section 9 is configured to receive the output of the width section 8 and generate sound waves.

Looking at the operation by the above configuration, once the power is supplied and the operation is started, the main central processing section 6 supplies the address counter control signal to the address counter section 3 so as to provide the sound source of the integrated circuit memory card section 1. Among the data storage contents, information such as the number of songs recorded on the head, the start address of each song, and the playback time for each song is read as data and stored in the control data storage section 5.

When the user operates the control panel unit 10 to reproduce the desired music, the central processing control signal controls the central processing unit 6 to read the control information of the desired music from the control data storage unit 5.

The CPU 6 generates a system control signal, an address counter control signal, and an integrated circuit memory card control signal based on the read control information.

The address counter control signal has a start address and counter start information of a desired song, and the address counter section 3 receives an address counter control signal as an input and outputs an address signal to the integrated circuit memory card section 1.

Here, the integrated circuit memory card control signal is a signal that distinguishes special functions for controlling the integrated circuit memory card audio, for example, functions such as stop, pause, fast count up (UP), and fast count down (DOWN).

The address counter 3 receives information of an address counter control signal and an integrated circuit memory card control signal as inputs, and performs functions such as setting necessary addresses, up / down counting, and high impedance output.

The parity check unit 2 checks whether the data inputted from the integrated circuit memory card unit 1 is normal. If the parity check unit 2 outputs parity check data when the data is normal, information about the parity check data is output. To the storage unit 5 to cause the central processing unit 6 to stop the operation of the integrated circuit memory card audio.

The signal processor 4 divides the left channel signal and the right channel signal from the parity check data input from the parity check unit 2 and outputs them to the D / A converter 7.

The D / A converter 7 converts the input left channel signal and the right channel signal into analog left channel signals and analog right channel signals, respectively, and supplies them to the line amplifier 8.

The line amplifier 8 amplifies and outputs the analog left channel signal and the analog right channel signal into a left output signal and a right output signal of power capable of driving the speaker unit 9.

The speaker unit 9 generates sound waves that can be heard by the user.

In this case, the address and data transfer must be large. For example, if the memory capacity is 16 mega word x 16 bits, at least 42 pins including address 24 bits, data 16 bits, and power supply terminal 2 bits are required. Multi-pin integrated circuit memory card having a must be used.

2 is another embodiment of the present invention, in which 11 is an integrated circuit memory card unit, 12 is a parity check unit, 13 is an address counter unit, 14 is a signal processor, 15 is a control data storage unit, 16 is a central processing unit, and 17 Denotes a D / A converter, 18 denotes a line amplifier, 19 denotes a speaker, 20 denotes a control panel, and 21 denotes a compression coding / decoding portion.

When the compression coding process is performed in order to increase the amount of the sound source data stored in the integrated circuit memory card, the sound source reproduction system performs the decoding process for releasing the compression coding.

A central processing unit 16 which receives a central processing control signal by an operation of the control panel unit 20, an address counter 13 which receives a signal from the central processing unit 6, and generates an address signal; An integrated circuit memory card unit 11 for outputting data by inputting the output from 13), a parity confirmation unit 12 for outputting parity confirmation data by inputting an output of the integrated circuit memory card unit 11, The output from the parity checker 12 receives the signal from the central processing unit 16, compresses / decodes the compression coding / decoding unit 4, and outputs a decoded output signal to the signal processing unit 14.

The signal processing unit 14 generating a channel signal by receiving the signal from the compression coding / decoding unit 21, the output from the compression coding / decoding unit 21 and the central processing unit 16, and receiving the center signal. The control data storage unit 15 which generates a control signal to the processing unit 16, the D / A conversion unit 17 which receives a signal from the signal processing unit 4, and the D / A conversion unit 17 are converted. And a speaker 19 for receiving sound from the line amplifier 18 and for generating sound waves.

3 is a block diagram of the compression / decoding unit 21.

In the figure, 22 denotes a first selector, 23 denotes a decoding unit, and 24 denotes a second selector.

As shown in the figure, a first selector 22 receiving a signal from the parity check unit and a header indication signal from the central processing unit, a decoding unit 23 connected to the first selector, and a decoding unit ( And a second selector 24 for outputting to the signal processor / control data storage.

Referring to the above-described process, the first selector 22 and the second selector 24 are directly connected to each other by a bypass signal line during a header period for receiving a header instruction signal from the central processing unit. Input data by receiving a header indication signal from the central processing unit and connecting it through a decoding unit 23 mounted between the first selector 22 and the second selector 24 while the compressed and coded data is input. Since the processing is performed through the decoding unit 22, the decoded output signal subjected to the compression coding / decoding process is output to the signal processing unit / control data storage unit.

Accordingly, the present invention provides an integrated circuit (IC) memory card audio system using an integrated circuit (IC) memory card having a built-in ROM as a medium for storing a sound source. By using an integrated circuit (IC) memory card with built-in integrated circuit, it is possible to ignore the damage of sound source data, eliminating the need for complicated signal processing system such as the use of error correction codes, and simplifying the circuit configuration for sound source reproduction. It is possible to significantly reduce the size of the device and to make it easy to install as a portable or other system accessory.In addition, integrated circuit (IC) memory cards have much greater advantages in terms of durability, heat resistance and mechanical damage than CD or DAT. It has the effect that it can be used as a permanent sound source medium.

Claims (3)

The control panel unit 10 by the user's mechanical operation, the central processing unit 6 receiving the central processing control signal by the operation of the control panel unit 10, the signal received from the central processing unit 6, the address signal An address counter section 3 for generating a signal, an integrated circuit memory card section 1 for outputting data by inputting the output from the address counter 3, and an output of the integrated circuit memory card section 1 as an input. A parity check unit 2 for outputting parity check data, a signal processing unit 4 for receiving an output from the parity check unit 2 and generating a channel signal, the parity check unit 2 and the central processing unit 6; Control data storage unit 5 for receiving an output from the control unit and generating a control signal to the central processing unit 6, a D / A conversion unit 7 for receiving a signal from the signal processing unit 4, and the D / A A for amplifying the signal converted by the conversion unit (7) Integrated circuit (IC) memory card audio system, characterized in that it comprises a speaker section (9) for receiving the output of the phosphor amplifier (8) and the line amplifier (8). An audio system comprising an integrated circuit memory card storing compression coded sound source data as a sound source medium; The control panel unit 20 by the user's mechanical operation, the central processing unit 16 receiving the central processing control signal by the operation of the control panel unit 10, the address signal received from the central processing unit 16 An address counter 13 for generating a signal, an integrated circuit memory card 11 for outputting data by inputting the output from the address counter 13, and an output of the integrated circuit memory card 11 A parity checking unit 12 for outputting parity check data, a compression coding / decoding unit 21 for receiving a coded output from the parity checking unit 12 and generating a decoded output signal, and the compression coding / decoding. A signal processor 14 for generating a channel signal by using an output signal as input, receiving outputs from the parity checker 12 and the central processor 16, and generating a control signal to the central processor 16. Data storage 15, a D / A converter 17 for receiving a signal from the signal processor 14, and a line amplifier 18 for amplifying the signal converted by the D / A converter 17. And a speaker unit (19) for generating sound waves in response to the output of the line amplifier (18). The first coder 22 of claim 2, wherein the compression coding / decoding unit 21 receives a signal from the parity checker and receives a header indication signal from the central processing unit, and a decoding connected to the first selector. And a second selector (24) connected to the decoding unit (23) and the first selector (22) for outputting to the signal processing unit / control data storage unit. A) memory card audio system.