KR100589841B1 - Apparatus and Method for Implementing Voice Multiple of Car CD-Player - Google Patents

Abstract

The present invention relates to a vehicle CD, and more particularly, comprising: a data decoding unit for reading data stored in a CD; An amplifier for amplifying the voice data and the image data decoded by the decoder; An error correction unit for correcting an error when an error occurs in a frame of data amplified by the amplifier; A CD microcomputer for controlling the overall operation of the error correction unit; An ampex decoder unit for decompressing the compressed audio data and the video data; A boot ROM which stores a program for operating the MPEG decoder unit; 4M RAM for temporarily storing data generated when the compressed data is restored by the MPEG decoder unit; An amppack CPU controlling overall operation of the MPEG decoder unit; A RAM that stores a program for driving the ampaq CPU; An S-RAM for temporarily storing data generated when the Amppac CPU is driven; A video low pass filter unit for removing noise of the video signal output from the amp decoder unit; A D / A converter for converting the digital signal of the audio output from the amp decoder unit into an analog signal; An audio low pass filter for removing noise of the audio signal converted by the D / A converter; As a multiplex device for voice CD player, the present invention is configured to include a key selection unit for selecting a voice to be listened to by the user. The present invention simplifies the hardware configuration of the vehicle CD and increases the reliability of the system. There is.

Description

Apparatus and Method for Implementing Voice Multiple of Car CD-Player

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method for implementing voice multiplexing of a vehicle CD-player. In particular, a left channel (L channel below LFT CHANNEL) and a right channel (R channel below RIGHT CHANNEL) of a video CD for multilingual support By processing audio signals separately stored in each channel) inside the MPEG (MOTION PICTURE EXPERT GROUP) decoder chip, only one channel (L channel or R channel) is selected and output according to the user's key selection, or left and right channels The present invention relates to an apparatus and method for implementing a voice multiplex of a vehicle CD-player for outputting at the same time to help foreign languages.

Conventional video CDs use expensive karaoke ICs to support multiple languages to separate and output audio signals stored in L and R channels. In other words, the audio signal decoded by the MPEG decoder IC is selected using the karaoke IC to select the L channel and the R channel, and only the selected channel is output. This is expensive due to the use of the expensive karaoke IC. There was a problem that takes up a lot of volume to mount.

An object of the present invention is to solve the above-mentioned conventional problems, and in particular, the configuration (CONFIGURATION) inside the MPEG decoder chip is controlled in software according to the user's key input, CD and L channel and R channel When decoding the audio signal inside the MPEG decoder chip with the coded voice signal, the L and R channel voice signals are selected and output according to the user's key input, so that the vehicle can implement the voice multiple functions without using complicated circuits. Disclosed are an apparatus and a method for implementing multiple voices of a CD-player.

In order to achieve the above object, the apparatus for implementing a voice multiplex of a vehicle CD-player according to the present invention includes a data decoding unit for reading data stored in a CD; An amplifier for amplifying the voice data and the image data decoded by the decoder; An error correction unit for correcting an error when an error occurs in a frame of data amplified by the amplifier; A CD microcomputer for controlling the overall operation of the error correction unit; An ampex decoder unit for decompressing the compressed audio data and the video data; A boot ROM which stores a program for operating the MPEG decoder unit; 4M RAM for temporarily storing data generated when the compressed data is restored by the MPEG decoder unit; An amppack CPU controlling overall operation of the MPEG decoder unit; A RAM that stores a program for driving the ampaq CPU; An S-RAM for temporarily storing data generated when the Amppac CPU is driven; A video low pass filter unit for removing noise of the video signal output from the amp decoder unit; A D / A converter for converting the digital signal of the audio output from the amp decoder unit into an analog signal; An audio low pass filter for removing noise of the audio signal converted by the D / A converter; The technical configuration is characterized by including a key selector to allow a user to select a voice to listen to.

Hereinafter, with reference to the accompanying drawings for an embodiment according to the technical idea of the apparatus and method for voice multiplex implementation of the present invention vehicle CD-player configured as described above are as follows.

<Example>

The decoding unit 10 reads the data stored in the compact disc and applies it to the amplifying unit 20. The amplifying unit 20 amplifies the audio data and the image data decoded by the decoding unit 10 to correct the error. If the error occurs in the frame of the data amplified by the amplifier 20, the error correction unit 30 corrects the error and applies it to the amplifier decoder 50, and the CD microcomputer 40 In FIG. 1, a signal for controlling the overall operation of the error correction unit 30 is applied to the error correction unit 30.

The amplifier packer 50 receives the compressed audio signal and the video signal from the error correction unit 30, decompresses the video signal, and applies the video signal to the video low pass filter unit 200. The audio signal is a D / A converter. In the boot ROM 60, a program for operating the amp decoder decoder 50 is stored and applied to the amp decoder decoder 50. In the boot ROM 60, the amp decoder decoder unit is applied to the amp decoder decoder 50. Temporarily stores the data generated when the compressed data is restored at 50, and the amppack CPU 80 applies a control signal to the amppack decoder 50 to control the overall operation of the amppack decoder 50 and the ROM. In (90), a program for driving the amppack CPU 80 is stored and applied to the amppack CPU 80, and the SRAM 100 temporarily stores data generated when the amppack CPU 80 is driven. In the video low pass filter unit 200, The noise of the video signal output from the amp decoder unit 50 is removed and applied to a display unit (not shown) so that a user can watch the video. In the D / A converter 300, the amp decoder decoder unit 50 is used. The digital signal of the audio output from the audio signal is converted into an analog signal and applied to the audio low pass filter unit 400, and the audio low pass filter unit 400 converts the noise of the audio signal converted by the D / A converter 300. By removing and outputting to a speaker (not shown) so that the user can listen to the audio, the key selector 500 applies the signal selected by the user to the amppack CPU 80 so that the user in the amppack decoder unit 50 This embodiment is constructed by outputting only the selected voice.

Hereinafter, the operation of the present embodiment configured as described above will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, the data (audio signal and video signal) of the compact disc read by the decoding unit 10 is applied to the amplifying unit 20, and the amplifying unit 20 amplifies the audio signal and the video signal, thereby making an error. The correction unit 30 is applied.

The error correction unit 30 receiving the audio signal and the video signal from the amplifying unit 20 checks whether there is an error code in the data, and if there is an error code, corrects the error. This is applied to the amp decoder unit 50. At this time, all operations of the error correction unit 30 are controlled by the CD microcomputer 40.

The amplifier decoder 50 receiving the audio signal and the video signal from the error correction unit 30 decompresses the compressed audio signal and the video signal and applies the video signal to the video low pass filter unit 200. The audio signal is applied to the D / A converter 300. The video low pass filter unit 200 that receives the video signal from the amp decoder unit 50 removes the noise or other unnecessary noise from the video signal and transmits it to a display unit (not shown) so that the user can view it. do.

Meanwhile, the D / A converter 300 receiving the audio signal from the amp decoder decoder 50 converts the digital audio signal into an analog signal and applies the analog signal to the audio low pass filter unit 400. The audio low pass filter 400 receiving the analog audio signal from the 300 removes the noise mixed with the audio signal or other unnecessary noise and transmits it to the speaker (not shown) so that the user can listen to the sound. .

On the other hand, in the compact disc, different languages are coded in the left channel and the right channel, or different languages are coded in the stereo format. Referring to the operation of restoring an audio signal of a compact disc having a different language coded in two channels as described above, the user first selects an audio signal of a language (eg, English) that the user wants to listen to. When the selection is made through the unit 500, the signal of the key selection unit 500 is applied to the amppack CPU 80.

After receiving the signal of the language selected by the user, the Amppack CPU 80 reads a language-specific signal stored in the ROM 90 and compares it with a signal applied from the key selection unit 500. After the comparison is completed, A signal is applied to the amplifier decoder 50 so as to restore only the channel in which the language selected by the user is coded and not restore the audio signal of the remaining channel not selected by the user. The amplifier packer unit 50 receiving the above-mentioned signal from the amplifier pack CPU 80 restores only the selected channel and applies it to the D / A converter 300. However, at this time, the D / A converter 300 simultaneously transmits the restored audio signal to the right speaker and the left speaker.

For example, assuming that English is selected from English and Korean, and presses a key written in English in the key selector 500, the write high signal is applied to the amppack CPU 80. The amppack CPU 80 receiving the write high signal recovers only the write channel from this time and does not restore the left channel. In order to restore only the light channel, the amppack CPU 80 applies a signal to the amppack decoder unit 50, and the amppack decoder unit 50 that restores the actual audio signal is in accordance with the control signal of the amppack CPU 80. Only the light channel in which the audio signal is coded is restored.

Hereinafter, a method of implementing voice multiplexing of a vehicle CD-player will be described with reference to FIG. 2, and a first step S1 of comparing and determining whether the outputted system is a stereo system; A second step (S2) of performing the same operation continuously if it is not the stereo method as a result of the comparison judgment of the first step (S1); A third step (S3) of comparing and determining whether Korean is selected when the comparison result of the second step (S2) is a user's key selection; A fourth step (S4) of restoring only the channel in which the Korean is coded and outputting only the Korean audio signal if the Korean is selected as a result of the comparison decision of the third step (S3); A fifth step (S5) of comparing and determining whether a foreign language is selected if the comparison decision result of the third step (S3) is not selected; A sixth step (S6) of restoring only the channel in which the foreign language is coded and outputting only the audio signal of the foreign language if the foreign language is selected as a result of the comparison judgment of the fifth step (S5); If a foreign language is not selected as a result of the comparison judgment of the fifth step S5, the operation is performed in a seventh step S7 for simultaneously outputting the foreign language and the Korean language.

As described above, the apparatus and method for implementing a voice multiplex of a vehicle CD-player according to the present invention, in particular, allows the L and R channels to be freely selected by accessing parameter values stored in a memory according to a key input signal selected by a user. The effect is to simplify the hardware configuration and increase the reliability of the system.

1 is a schematic diagram of an apparatus for implementing multiple voices of a vehicle CD-player according to the present invention;

     Block diagram,

Figure 2 shows a voice multiple implementation method of the vehicle CD-player of the present invention

     The control flow is also.

<Description of the symbols for the main parts of the drawings>

10: decoding unit 20: amplifying unit

30: Error correction 40: CD microcomputer

50: amp decoder decoder 60: boot ROM

70: 4M RAM 80: Amppack CPU

90: ROM 100: S RAM

200: Video low pass filter 300: D / A converter

400: Audio low pass filter 500: Key selector

Claims (2)

A data decoding unit for reading data stored in the CD; An amplifier for amplifying the voice data and the image data decoded by the decoder; An error correction unit for correcting an error when an error occurs in a frame of data amplified by the amplifier; A CD microcomputer for controlling the overall operation of the error correction unit; An ampex decoder unit for decompressing the compressed audio data and the video data; A boot ROM which stores a program for operating the MPEG decoder unit; 4M RAM for temporarily storing data generated when the compressed data is restored by the MPEG decoder unit; An amppack CPU controlling overall operation of the MPEG decoder unit; A RAM that stores a program for driving the ampaq CPU; An S-RAM for temporarily storing data generated when the Amppac CPU is driven; A video low pass filter unit for removing noise of the video signal output from the amp decoder unit; A D / A converter for converting the digital signal of the audio output from the amp decoder unit into an analog signal; An audio low pass filter for removing noise of the audio signal converted by the D / A converter; And a key selector for allowing a user to select a voice to be listened to. A first step (S1) for comparing and judging whether the output method is a stereo method; A second step (S2) of continuously performing operation in a method that is currently output if it is not a stereo method as a result of the comparison judgment of the first step (S1); A third step (S3) of comparing and determining whether Korean is selected when the comparison result of the second step (S2) is a user's key selection; A fourth step (S4) of restoring only the channel in which the Korean is coded and outputting only the Korean audio signal if the Korean is selected as a result of the comparison decision of the third step (S3); A fifth step (S5) of comparing and determining whether a foreign language is selected if the comparison decision result of the third step (S3) is not selected; A sixth step (S6) of restoring only the channel in which the foreign language is coded and outputting only the audio signal of the foreign language if the foreign language is selected as a result of the comparison judgment of the fifth step (S5); If the foreign language is not selected as a result of the comparison of the fifth step (S5), the voice CD of the vehicle CD-player is operated in the seventh step (S7) for simultaneously outputting the foreign language and Korean.