KR0164185B1 - A cd-dsp apparatus with cd-rom decoder - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CD-DSP device incorporating a CD-ROM decoder. An EFM demodulation unit for performing EFM demodulation of information data when an RF signal from a video disc is signal-processed by the digital PLL circuit 30 in a digital PLL scheme. (32), a data bus (36) for forming the transmission path of data for causing the EFM demodulated information data input through the register (34) to be digitally processed and to be CD-ROM decoded, and synchronized from the information data. A timing generator 38 for detecting a signal and generating a timing signal according to the signal, and a video disc is corrected based on the generated timing signal by the CLV processing unit 40, and corrects a data error of information data transmitted and processed by the digital signal. An error correction unit 42 for transmitting information data in units of units and a timing signal for CD-ROM decoding processing based on the synchronization signal detected by the synchronization detection unit 44 The dimming generator 46 descrambles and decodes an arbitrary code range of the information data in units of bytes to generate information data in units of blocks, and stores the information data in the memory unit 17 through the memory controller 49. Decoded information at the block stage by the instruction register 62 and the decoder 55 which store various control commands via the scrambler unit 48 and the microcomputer interface 58 for interfacing the control commands from the microcomputer 18. In accordance with the control command from the internal register (57) for storing the data, the FIFO unit (64) for sequentially inputting and outputting the information data stored in the data memory (52) And a host interface 66 for interfacing the information data through the FIFO unit 64 for MPEG decoding.

Description

CD-DSP device with a built-in CD-ROM decoder

1 is a block diagram showing the structure of a conventional video disc player.

2 is a block diagram showing the configuration of a CD-DSP device incorporating a CD-ROM decoder according to the present invention.

* Explanation of symbols for main parts of the drawings

30: digital PLL circuit 32: EFM demodulation unit

34: register 36: data bus

38,46: timing generator 40: CLV processing unit

42: Erobo Government 44: Motivation Detector

46: timing generator 48: descrambler unit

49: memory controller 50: bus intermediary

52: data memory 54: address generator

55: decoder 56: memory encoder

57: internal register 58: microcomputer interface

62: command register 64: FIFO section

66: Nocturnal Force Face

The present invention relates to a CD-DSP device incorporating a CD-ROM decoder, and more particularly, to a CD-DSP (CD-Digital Signal Processor) which digitally processes information data read from a video disc in a video disc player. The present invention relates to a CD-DSP device incorporating a new type of CD-ROM decoder having a built-in CD-ROM decoder for decoding the information data into CD-ROM data.

Currently, a video disc is introduced as a disc-shaped information recording medium on which video information and audio information of a moving picture are recorded. The video disc includes, for example, a video flexible program for practicing video flexible, a language program for acquiring a movie program, or a language. The video information and audio information of the program are processed and recorded, for example, by a well-known MPEG data compression algorithm.

According to the video disc player for reading video / audio by reading the information recorded on such a video disc, as shown in FIG. 1, the stable information through the constant speed rotation of the video disc D containing a large amount of video information and audio information is shown. A servo driver 2 for controlling the read state, a motor driver 4 for driving the spindle motor 6 which is servo-controlled by the servo controller 2 to rotate the video disc D at constant speed, and the servo. An optical pickup 10 for reading recording information by irradiating a laser beam to a recording surface of the video disc D and receiving reflected light through driving of a pickup driving unit 8 driven and controlled by the control unit 2; RF amplifier 12 for amplifying the RF signal of the information data read by the optical pickup 10, the amplified RF signal, that is, video information and audio information as a serial data stream (Serial Data Stream) A CD-DSP 14 for digital signal processing, a CD-ROM decoder 16 for decoding video and audio information in the form of a serial data stream processed as digital signals as CD-ROM data having user data; The memory unit 17 stores the CD-ROM data decoded by the CD-ROM decoder 16, and controls the servo operation of the servo controller 2, and the CD-DSP 14 and CD-. The first microcomputer 18 which generally controls the operation of the ROM decoder 16, and the MPEG audio / video decoder which restores the data of the CD-ROM decoded video information and audio information by MPEG method. (20), a second microcomputer (22) for controlling the decoding operation of the MPEG audio / video decoder (20), an RGB encoder (24) for encoding video information reconstructed by the MPEG method into an RGB signal capable of reproducing an image, and The audio information is reproduced by the restored audio information. In the form of an analog signal, which signal converter DAC; it is configured to include a (26 Digital-Analog Converter).

In a video disc player having such a component, when the recorded information data of the video disc D which is rotated at constant speed by the spindle motor 6 is read by the optical pickup 10 and amplified by the RF amplifier 12, By processing the digital signal in the form of a serial data stream in the CD-DSP 14 in the form of a serial data stream and correcting the error of the data, the CD-ROM decoder 16 obtains the information data in the form of the serial data stream. The data is decoded as CD-ROM data, and the CD-ROM decoded information data is decoded in an MPEG manner through the MPEG audio / video decoder 20, while in the case of video information, the RGB encoder 24 is used as an RGB signal. Encoded video is reproduced, and in the case of audio information, the DAC 26 converts the signal into an analog signal to reproduce audio.

However, in such a video disc player, when the digital signal is processed through the CD-DSP 14 and the error is corrected, the information data is formed of 8-bit serial bit data and transmitted to the CD-ROM decoder. In the ROM decoder, the transmitted serial bit data must be converted to parallel bit data, thereby reducing the efficiency of data processing and making it difficult to process large amounts of information data at high speed.

Accordingly, the present invention has been made in view of the above-described circumstances, and the CD-ROM decoder which decodes the CD-ROM data into the CD-DSP for digital signal processing of the information data from the video disc is mixed and embedded. An object of the present invention is to provide a CD-DSP device incorporating a CD-ROM decoder for improving processing efficiency.

According to a CD-DSP apparatus incorporating a CD-ROM decoder according to the present invention for achieving the above object, there is provided a video disk player for video / audio reproduction of information data read from a video disk; A digital PLL circuit for processing an RF signal according to the information data from the video disc using a digital locked loop (PLL) method, an EFM demodulator for performing EFM demodulation of the information data processed in the digital PLL method, and a bus relay unit. The EFM demodulated information data input through a register through data intermediation is digitally processed, and a data bus which forms a transmission path of data for CD-ROM decoding, and detects a synchronization signal from the information data. A timing generator for generating a timing signal, a CLV processor for generating a CLV control clock signal for causing the video disk to rotate at a constant linear velocity based on the generated timing signal, and processing the digital signal Data frame information by correcting data error of information data transmitted through An error correction unit for transmitting data, a synchronization detector for detecting a synchronization signal from the digital signal processed information data, a timing generator for generating a timing signal for CD-ROM decoding processing based on the detected synchronization signal, and the information data A descrambler unit for generating information data in units of blocks by descrambling and decoding an arbitrary code range of a unit of bytes and a memory for storing the decoded information data in units of blocks in a memory unit A memory controller for performing a control operation, a data memory having a storage function for correcting CIRC errors of the information data, an address generator for providing address data for information data controlled by a memory encoder and stored in the data memory; Decoded information decoded through a decoder for information data in a block unit An internal register for storing, a micom interface for interfacing control commands from the micom, a command register for storing various control commands through the micom interface, and information data stored in the data memory are sequentially input and sequentially output. A CD-DSP device having a CD-ROM decoder having a FIFO unit and a host interface for interfacing the information data through the FIFO unit for MPEG decoding according to a control command from the command register is provided.

According to the present invention made as described above, the CD-DSP and the CD-ROM decoding the serial data stream data and the CD-DSP processing the digital signal in the form of a serial data stream RF signal read from the video disc in the video disc player By intermixing and combining CD-ROM decoders, the transmission speed in data transmission is increased, and high speed and large capacity data transmission are possible.

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

2 is a block diagram showing the structure of a CD-DSP device incorporating a CD-ROM decoder according to the present invention. In the device of the present invention, the digital PLL circuit 30, the EFM demodulator 32, and the register are shown. (34), the timing generator 38, the CLV processing section 40, and the error correction section 42 correspond to a digital signal processing system for digitally processing the RF signal from the video disc.

In the figure, reference numeral 30 denotes a digital PLL circuit which processes the RF signal according to the information data from the video disc read and RF-amplified by optical pickup [not shown] in a digital PLL method, and 32 denotes the digital PLL. The EFM demodulation unit performs EFM demodulation for converting the information data signal-processed in the manner into symbol data before modulation, and 34 denotes a register for temporarily storing the EFM demodulated information data.

Also, reference numeral 36 denotes a data bus which receives data mediation by the bus intermediary unit 50 and receives digital data processed information through the register 34 to provide a data transmission path for CD-ROM decoding. Indicates.

Reference numeral 38 denotes a timing generator which generates a timing signal based on the synchronization signal by detecting the synchronization signal of the information data from the digital PLL circuit 30 and the EFM demodulator 32, and 40 denotes the generation. And a CLV processing section for generating a CLV control clock which enables reading of normal information by constant speed rotation through the CLV speed of the video disc by the timing signal.

Reference numeral 42 denotes an error correction unit for correcting a data error of the information data processed by the digital signal and transmitting the information data frame by frame through the data bus 36.

In the figure, the synchronization detector 44, the timing generator 46, the descrambler 48, the microcomputer interface 58, the instruction register 62, the FIFO unit 64, and the host interface 66 are described above. Corresponds to the CD-ROM decoding processing system for decoding digital data processed information data into CD-ROM data.

In the apparatus of the present invention according to the drawing, reference numeral 44 denotes a synchronization detector for detecting a synchronization signal in digital signal processed information data transmitted through the data bus 36, and 46 denotes a synchronization signal through the detected synchronization signal. A timing generator for generating a timing signal for CD-ROM decoding of the information data.

Further, reference numeral 48 denotes a descrambler unit for descrambling an arbitrary code sequence by scrambling the digital data processed information by byte unit and CD-ROM decoding to generate block data information data. Represents a memory controller for performing a memory control operation for storing the decoded block data generated in the block unit in the memory unit (see Fig. 1) made of SRAM, for example, 52 is the information of the block unit 54 shows a data memory for performing a storage function for correcting CIRC errors for data, 54 denotes an address generator for generating address data for information data stored in the data memory 52, and 56 denotes an address generator. A memory encoder for controlling the address generation operation at 54 is shown.

Also, reference numeral 55 denotes a decoder 55 that performs a decoding operation on the information data in block units, and denotes an internal register that temporarily stores decoding information of the information data decoded through the decoder 55.

Reference numeral 58 denotes a microcomputer interface for interfacing control commands from the microcomputer 18 for controlling overall functional operations of the video disc player, and 62 denotes a command register for temporarily storing the interfaced control commands.

Also, reference numeral 64 denotes a FIFO (First-In First-Out) which stores the timing of the information data stored in the data memory 52 so that the timing data can be sequentially output through the stored timing at the time of reading the information data. And (66), the interface 66 interpolates the information data according to the CD-ROM decoding result through the FIFO unit 64 based on the control command from the command register 62 and transmits it as information data for MPEG decoding. Represents a host interface.

Next, the operation of the present invention made as described above will be described in detail with reference to FIG.

First, when an RF signal corresponding to information data from a video disc read by an optical pickup [not shown] is RF amplified, the digital PLL circuit 30 performs signal processing on the RF signal in a digital PLL manner, and the EFM recovery is performed. The grandfather 32 performs EFM demodulation of the information data in the form of original symbol data, while the EFM demodulated information data is temporarily stored in the register 34.

At this time, the timing generator 38 detects a synchronization signal from the information data from the digital PLL circuit 30 and the EFM demodulator 32 and generates a timing signal accordingly, and the CLV processor 40 generates the timing signal accordingly. On the basis of the timing signal, a CLV control clock is generated for reading normal information according to the constant speed rotation of the video disc.

The error correction section 42 then corrects the data error in the digital signal processed information data transmitted via the data bus 36, while the synchronization detection section 44 provides information via the register 34. The data is received from the data bus 36 to detect a synchronization signal according to the information data, and the timing generator 46 generates a timing signal for CD-ROM decoding of the information data based on the detected synchronization signal. do.

On the other hand, the descrambler 48 receives the digital data processed information data through the data bus 36, descrambles the information of any code boundary type in units of bytes, and decodes the data in units of blocks. As the data is stored in the data memory 52 in units of blocks via the bus 36, the data memory 52 receives address data from the address generator 54 controlled by the memory encoder 56. The information data is stored.

In addition, when the information data is stored in the data memory 52, the FIFO unit 64 memorizes the timing of the information data, and the data is sequentially stored through the timing information stored at the time of reading the information data. Will cause the output.

Then, when a control command for MPEG decoding of the CD-ROM decoded information data is sent from the microcomputer 18, the microcomputer interface 58 interfaces the control command and temporarily stores it in the instruction register 62. The host interface 66 receives the control command from the command register 62, interfaces the information data from the FIFO unit 64, and sends the data to enable decoding in MPEG.

According to the present invention as described above, a CD-DSP for digitally processing an RF signal of information data read from a video disc in a video disc player and a CD-ROM decoder for CD-ROM decoding the information data are mixed. By combining them, it is possible to reduce the unnecessary deformation of the transmission path of the information data, thereby enabling the high-speed and large-capacity data processing.

Claims (1)

A video disc player for video / audio reproduction of information data read from a video disc, comprising: a digital PLL circuit (30) for processing a RF signal according to the information data from the video disc in a digital PLL scheme, and the digital PLL scheme The EFM demodulated information data, which is input through the register 34 through the data intermediation by the EFM demodulator 32 and the bus intermediate unit 50, EFM demodulates the signal data processed by the digital signal, A data bus 36 which forms a transmission path for data to be CD-ROM encoded, a timing generator 38 which detects a synchronization signal from the information data and generates a timing signal accordingly, based on the generated timing signal CLV processing unit 40 for generating a CLV control clock signal for causing the video disk to rotate at a constant speed at a CLV speed, the digital signal being processed An error correction unit 42 for correcting a data error of the information data transmitted through the bus 36 to transmit the information data in units of frames, a synchronization detector 44 for detecting a synchronization signal from the digital signal processed information data, A timing generator 46 for generating a timing signal for CD-ROM decoding processing based on the detected synchronization signal, and decodes and decodes an arbitrary code sequence of the information data in units of bytes to block information; A descrambler unit 48 for generating data, a memory controller 49 for performing a memory control operation for storing the decoded information data in units of blocks in the memory unit 17, and a CIRC error correction for the information data. The data data stored in the data memory 52 controlled by the data memory 52 and the memory encoder 56 having a storage function is stored. The address generator 54, an internal register 57 for storing the decoded decoding information through the decoder 55 with respect to the block unit information data, and a microcomputer interface for interfacing control commands from the microcomputer 18 ( 58), a command register 62 for storing various control commands through the microcomputer interface 58, and a FIFO unit for inputting and sequentially outputting information data stored through the memory controller 49 (64) and a host interface (66) for interfacing the information data through the FIFO unit (64) for MPEG decoding in accordance with a control command from the command register (62). CD-DSP device with a built-in ROM decoder.