JPS6278791A - Data processor - Google Patents

Abstract

PURPOSE:To use effectively the function of a display device by providing a memory means which stores previously the data of the same format as the record information to be recorded on a recording medium as a subcode and processing the data stored in a said memory means when the record information bit contains no record information. CONSTITUTION:A data memory 10 stores previously the picture information of the same format as the picture information that is recorded on a disk as subcode. In case the picture information is not recorded on the disk set in a player as a subcode, no picture processing instruction is detected by an instruction discriminating circuit 4 together with no output of an instruction detecting signal. Thus the data is read out of the memory 10 by a memory control circuit 9 and supplied to an instruction analyzing circuit 11. The data is delivered from the circuit 11 only out of both instruction analyzing circuits 5 and 11. Then the pictures are reproduced according to the data stored in the memory 10. Thus it is possible to use effectively a device that works according to the record information.

Description

TECHNICAL FIELD The present invention relates to a data processing device, and more particularly to a device for processing data recorded as subcodes on a digital audio disc.

BACKGROUND ART Recently, a method of recording and reproducing image information as a subcode on a digital audio disk having an outer diameter of about 12 lines, generally called a compact disk (hereinafter abbreviated as CD), has been studied.

In such a system, the data corresponding to the image information consists of the lower 6 bits of the 8 bits forming the subcode.
Words are formed and 987-words are treated as one unit. Two of these 98 words are used as synchronization signals, and 24 words obtained by equally dividing the remaining 996 words into four are treated as the minimum unit of data and constitute one image processing command. This 24-word structure is an example of the second
As shown in the figure, the first word of 24 words indicates the recording mode. The second word following the word indicating the recording mode is an instruction word indicating the type of instruction. The third and fourth words following the instruction word are Q parity which is an error correction code. The fifth and sixth words following the Q parity contain color data specifying the channel number and screen color.

The channel number is represented by 4 pits from 0 to 15.
is one of the numerical values, exists only in a specific instruction, and indicates the type of data within one unit. 7 following two words containing channel number and color data
The 8th and 8th words contain location data indicating the data display position within the screen. The 16 words following the two words containing this location data contain data and P parity which is an error correction code.

Recording modes include line graphics mode and T
There are two types of V graphics modes. In addition, image processing commands include, for example, commands to fill the entire screen with a certain color, and one of the screen constituent units (for example, in TV graphics mode, the entire screen is divided into 18 equal parts in the vertical direction and 50 equal parts in the horizontal direction). One screen is divided into 900 screen units (FONTs) in total.Instructions to draw a picture using two types of colors, instructions to move the entire screen vertically or horizontally, etc. be.

Similarly, one of the upper two bits of the eight bits forming the subcode contains time information corresponding to the track length from the beginning of the program area of the CD to a predetermined location of each information data recorded, and indicates the recording position. It forms Q data consisting of address time data that can be used as position data to indicate. Furthermore, the other of the top two pits forms P data including inter-track information.

A device as shown in FIG. 3 has been devised as a data processing device that processes data recorded as subcodes as described above to control a display device such as a CRT (cathode ray tube) display. In Fig. 3, 1 is a digital audio disc player, which reads recorded information on the disc and outputs 8-bit parallel data forming a subcode in addition to the audio signal at a cycle of, for example, 136 μsea. It is configured. The parallel data output from the player 1 is supplied to a data processing device 2.

In the data processing device 2, output data of the player 1 is supplied to a decoder 3. The decoder 3 extracts 6 bits forming an image processing command from the 8-bit parallel data, restores the data arrangement order changed by interleaving performed during recording, corrects errors, and outputs the data. It is configured as follows. The output data of this decoder 3 is supplied to an instruction discrimination circuit 4. The command determination circuit 4 is configured to output the output data of the decoder 3 as is, and at the same time determine the presence or absence of an image processing command based on the bit pattern of the data, and generate a command detection signal when detecting the presence of an image processing command. ing. The output data of the instruction discrimination circuit 4 is supplied to the instruction analysis circuit 5. The instruction analysis circuit 5 is configured to analyze the instruction word of the supplied data and generate and output data indicating the color of each pixel on the screen based on each data in the image processing instruction. ing. The output data of this command analysis circuit 5 is supplied to a display device control circuit 6. The display device control circuit 6 generates three primary color signals of red, green, and blue and a synchronization signal based on the output data of the command analysis circuit 5 in response to the command detection signal output from the command discrimination circuit 4, and performs a CR.
It is configured to be supplied to a display device 7 such as a T-display.

In the above configuration, when a disc on which image information is not sub-coated and recorded is loaded into the player 1, the display device 7 is not supplied with the three primary color signals from the display device control circuit 6, so that the screen of the display device 7 is This has the disadvantage that no image appears and the functions of the display device 7 cannot be used effectively.

SUMMARY OF THE INVENTION An object of the present invention is to provide a data processing device that can effectively utilize a device that performs operations based on recorded information even when no recorded information exists in the recorded information bits of a subcode read from a recording medium. It is to provide.

The data processing device according to the present invention includes a storage means in which data in the same format as the recorded information recorded as a subcode on a recording medium is stored in advance, and the recorded information exists in the recorded information bit of the subcode. When not in use, the data stored in the storage means is processed.

EXAMPLE Hereinafter, an example of the present invention will be described in detail with reference to FIG.

As shown in FIG. 1, in a data processing device 8 according to the present invention, a decoder 3, an instruction discrimination circuit 4, an instruction analysis circuit 5, and a display device control circuit 6 are connected in the same manner as in the device shown in FIG. However, in the data processing device 8 according to the present invention, the command detection signal output from the command discrimination circuit 4 is supplied to the memory control circuit 9. The memory control circuit 9 is configured to read and output data stored in the data memory 10 by controlling the address input of the data memory 10 when the command detection signal is not present and when the operation command signal is supplied. has been done. The data memory 10 is
The R, OM (Riad Only Mem) is pre-stored with image information in the same format as the image information recorded as a subcode on the disc, and is mounted using an IC socket etc. for easy attachment and detachment.
ory).

Data output from the memory control circuit 9 is supplied to an instruction analysis circuit 11 having the same configuration as the instruction analysis circuit 5. Output data of the command analysis circuit 11 is supplied to the display device control circuit 6. The display device control circuit 6 is supplied with an input designation signal output from the interrupt processing circuit 12 . The display device control circuit 6 uses the command analysis circuit 5 when there is no input designation signal.
and 11, and generates three primary color signals of red, green, and blue and a synchronization signal based on the data output from either one of the command analysis circuits 11 and 11, and when an input designation signal exists, based only on the output data of the command analysis circuit 11. It is configured to generate three primary color signals of red, green, and blue and a synchronization signal. The interrupt processing circuit 12 controls the display device control circuit 6 and the memory control circuit 9 in response to a processing switching signal output from the processing switching circuit 13.
The input designation signal and the operation command signal are respectively supplied to the input designation signal and the operation command signal. In addition, in a configuration of 0 or more in which the processing switching signal is configured to output a processing switching signal according to the operation state of the operation unit (not shown) by the user, when the processing switching signal does not exist, Since the input designation signal and the operation command signal are not supplied to the display device control circuit 6 and the memory control circuit 9, if the Peng image information is recorded as a subcode on the disc loaded in the player 1, the command discrimination circuit 4 An image processing command is detected and a command detection signal is output.As a result, the memory control circuit 9
does not operate, and only the instruction analysis circuit 5 of the instruction analysis circuits 5 and 11 outputs data, and the image information recorded as a subcode on the disc is reproduced. Further, if image information is not recorded as a subcode on the disc loaded in the player 1, the instruction determination circuit 4 will not detect an image processing instruction and will not output an instruction detection signal. As a result, the data memory I is controlled by the memory control circuit 9.
The data stored in J 10 is read out and supplied to the instruction analysis circuit 11, and of the instruction analysis circuits 5 and 11, only the instruction analysis circuit 11 outputs data to the data stored in the data memory 10. The image based on the image is reproduced.

Next, when a processing switching signal exists, an input designation signal and an operation command signal are supplied to the display device control circuit 6 and memory control circuit 9, so that image information is recorded as a subcode on the disc loaded in the player 1. The data stored in the data memory 10 is read out by the memory control circuit 9 and sent to the instruction analysis circuit 11 regardless of whether the
supplied to At the same time, a signal is generated in the display device control circuit 6 based only on the output data of the command analysis circuit 11, so that one image is reproduced based on the data stored in the data memory 10.

Effects of the Invention As detailed above, the data processing device according to the present invention includes a storage means in which data in the same format as the recorded information recorded as a subcode on a recording medium is stored in advance, and the recorded information bits of the subcode are stored in advance. Since the configuration is such that the data stored in the storage means is selectively processed when there is no recorded information in the subcode, even when there is no recorded information in the recorded information bits forming the subcode, the data stored in the storage means is processed. Displays can be made based on stored data, and a device that performs operations based on recorded information can be used effectively.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing the format of image information recorded as a subcode on a digital audio disc, and FIG.
The figure is a block diagram showing a conventional data processing device. Explanation of symbols of main parts

Claims (1)

[Claims] Based on the recorded information by processing data that is composed of control information bits including control information for controlling the reading operation of recorded information and recorded information bits in which the recorded information may exist, and is recorded as a subcode on a recording medium. A data processing device for controlling a device that performs an operation, comprising a storage means in which data in the same format as the recorded information is stored in advance, and when the recorded information does not exist in the recorded information bits, the storage means A data processing device characterized in that it processes data stored in.