JPH04349275A - Recording media - Google Patents

Abstract

PURPOSE:To slidhtly change and reproduce an existing digital audio disk player by digitizing the image information such as a character mark and a graphic in place of audio information and adding the address information to each group. CONSTITUTION:The still picture pattern information such as the character, mark and graphic is digitized and blocked, and this one block is further divided into the (n) number of the prescribed unit quantity of the sub-blocks respectively. The address is constituted of the music number, the timer information such as a minute and a second and further, a sub-block number as well as that of the existing digital audio disk, and the search function of a conventional digital audio disk player can be used. When a CPU 3 detects an ID field, it compares the designation address and the reproduction address, and when both are coincident, the next continuous data are stored into a memory 4 and the storing data are CRT-displayed by CRTC 7. Then, decoding is performed and reproduction can be performed.

Description

[Detailed description of the invention]

0001

TECHNICAL FIELD The present invention relates to a recording medium, and more particularly to a recording medium in which digitized signals of still image information such as characters, symbols, figures, etc. can be played back using a digital audio disc playing device. .

0002

[Background Art] Conventionally, CAV (constant angular velocity) is used to record still image pattern information such as characters, symbols, figures, etc.
There are video discs. Generally, the recorded information is recorded in the form of an analog signal, and therefore it is necessary to use a player exclusively for playing video discs. On the other hand, recently there are digital audio discs in which audio signals are digitized and recorded, and digital audio disc players for playing these discs are becoming popular. It would be advantageous if this digital audio disc player could be used to reproduce the aforementioned video information. In particular, it would be even more convenient if the so-called search (information retrieval) function of a digital audio disc player could be effectively utilized to reproduce video information.

0003

OBJECTS OF THE INVENTION An object of the present invention is to provide a recording medium that can reproduce image information such as still images using a search function by only making slight changes to an existing digital audio disc player.

0004

A recording medium according to the present invention includes digital image data divided into data of a predetermined unit data amount, and an address indicating the address of the predetermined unit data amount of data at the leading position of the data of the predetermined unit data amount. A code and an identification code indicating the type of digital image data are recorded.

[0005]

[Embodiments] Examples will be explained below with reference to the drawings. FIG. 1 is a schematic block diagram of a reproduction system for reproducing the recording medium of the present invention. A digital audio disc player 1 sends reproduction digital data and reproduction control data to an interface 2. This interface 2 is connected to each of a CPU (arithmetic processing unit) 3, video memory 4, RAM (random access memory) 5, keyboard 6, and CRTC (cathode ray tube controller) 7 via data buses. The output of the CRTC 7 controls a CRT (cathode ray tube) 8 to display reproduction information. The digital audio disc player 1 takes in control data indicating a search address input from the keyboard 6 via the interface 2, and performs an information search operation. For this purpose, the digital audio disc contains
Digital information is recorded in the format shown below.

FIG. 2 shows the arrangement of signals after decoding what has been recorded on the disk. Still image pattern information such as characters, symbols, and figures is digitized and divided into blocks. For example, one block of information data corresponds to one second, and each block contains n (n is an integer) predetermined number of pieces of information data. It is further divided into sub-blocks of unit quantity. This sub-block corresponds to, for example, 98 frames in the CD format. As shown in the figure, one of the sub-blocks consists of an identification data ID indicating the address of information data, etc., and subsequent data, and this ID is sandwiched between the gaps. The ID consists of a start mark indicating the beginning of the address, an address, and a control word. As the control word, for example, 4 control bits in Q channel data corresponding to 98 frames of the CD format can be used, and also indicates the type of image data of the sub-block.

[0007] The address consists of a track number, timer information such as minutes and seconds, and a sub-block number, similar to that of existing digital audio discs, so that the search function of conventional digital audio disc players can be used. It has become. Therefore, as described above, the search operation is performed based on the address information from the keyboard 6, and when the CPU 3 detects the ID field, it compares the designated address with the reproduction address. If the two match, the next data is stored in the memory 4, and the stored data is used as a display signal by the CRTC 7 to be displayed on the CRT.

The above operating procedure is shown in the flowchart of FIG.

[0009]

[Effects of the Invention] As described above, according to the present invention, characters and characters can be recorded on a digital audio disc instead of audio information.
By digitizing image information such as symbols and figures, dividing this into data of a predetermined unit data amount, and adding address information including control bits indicating the type of image data to each group, it is possible to use a microcomputer with a CRT display. It is possible to play back images by combining a device such as the above with a digital audio disc player, and by setting the address for information search in the same format as that recorded on existing digital audio discs, it is possible to play back images by combining devices such as There is an advantage that the search function of the disc player can be used as is.

[0010] Note that if you know the type of image data, you will also know the coding mode of the image data, and it is possible for a digital audio disc player to perform playback while performing decoding that corresponds to the coding mode of the image data. It becomes possible.

[Brief explanation of drawings]

FIG. 1 is a schematic block diagram of a reproduction system for reproducing a recording medium of the present invention.

FIG. 2 is a diagram showing an example of a recording format of a recording medium according to an embodiment of the present invention.

FIG. 3 is a flowchart showing the operation procedure of the blocks in FIG. 1;

[Explanation of symbols of main parts]

1...Digital audio disc player 3...C
PU 4...Video memory 6...Keyboard 8...CRT

Claims (1)

[Claims] 1. Digital image data divided into data of a predetermined unit data amount, an address code indicating an address of the predetermined unit data amount of data at the head position of the predetermined unit data amount of data, and the digital image data. A recording medium characterized by recording an identification code indicating the type.