JPH05159473A - Disk and disk reproducing device - Google Patents

Abstract

PURPOSE:To eliminate the situation of no sound at the time of starting a repro duction by instantly reading initial video data and shortening the period of time until the initial data is outputted. CONSTITUTION:This device is provided with a data reading means 31 for instantly reading initial data recorded on the main data of the initial part of the track of a disk 1 at the time of starting a track reproduction and outputting the initial video. It is also provided with a video flag detecting means 34 for detecting the video flag and prohibiting the output of a sound when the video data is read.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to video and music such as compact discs and subcode graphics, and CD-RO.
The present invention relates to a disc and a disc reproducing apparatus in which data such as M is mixed in one disc and recorded together with its management information.

[0002]

2. Description of the Related Art In recent years, compact discs (hereinafter referred to as CD
The use of discs that store not only music but also image data as well as music has become popular, and demands for more advanced usage are increasing.

FIG. 4 shows a recording structure of a conventional disk. Reference numeral 1 is a disk, 2 is a lead-in area in which management information of a data area 3 is recorded in sub-data, and 3 is composed of a plurality of tracks. A data area 4 in which audio data is recorded is a lead-out area.

Initial image data is recorded in the sub-data of the first portion of the first track 5, and the audio of the main data is silent. Audio is continuously recorded in the CD format in the next main data, and image data related to the audio of the main data is recorded in the sub data. Further, consecutive addresses are recorded in the sub data of the data area 3. The management information recorded in the lead-in area 2 includes the number of tracks, the recording time of the data area, and the start time of each track. Data is recorded on the second and third tracks in the same format as the first track 5.

An image is composed of 216 dots vertically and 300 dots horizontally, and 16 (4 bit) colors can be designated per dot. The data capacity of one image requires 32.4 Kbytes. Since the image data transfer speed of the sub data is 2.7 Kbytes per second, it takes 12 seconds to reproduce one screen.

FIG. 5 shows a block diagram of a conventional disc reproducing apparatus. Reference numeral 12 is an optical pickup for extracting the reproduction signal 13 from the disc 1, 14 is a signal processing means for processing the reproduction signal 13 and separating and outputting it into main data and sub data, 18 is an image data storage means for storing the image data 15, and 20 is an image. An image DA conversion means for converting the image data for one screen stored in the data storage means 18 from digital to analog,
Reference numeral 23 is a voice DA conversion means for converting the voice data 16 from digital to analog, 31 is a data reading means for reading the data recorded on the disk 1, 32 is an address decoding means for decoding an address, and 33 is a lead-in area. Management information storage means for storing stored management information, 3
5 is an initial setting means for initializing the reproducing operation, 36 is an input means for inputting a track number to be reproduced, 37 is a data reading means 31, an address decoding means 32, a management information storing means 33 and an initial setting means 35. The control means is composed of

The conventional disc reproducing operation of the conventional disc reproducing apparatus will be described. FIG. 6 shows a flowchart when a conventional disc is reproduced by a conventional disc reproducing apparatus.

The conventional disc is set in the conventional disc reproducing apparatus and the power is turned on. The optical pickup 12 reproduces the lead-in area 2 and outputs a reproduction signal 13 according to a command from the initial setting means 35. The reproduction signal 13 output from the optical pickup 12 is separated into main data and sub data by the signal processing means 14. The management information 26 recorded in the sub data of the lead-in area 22 is read (step 4
1). The read management information 26 is stored in the management information storage means 3
Store in 3. The track number "1" for instructing the reproduction of the first track 5 is input from the input means 36 (step 4).
2). When the data reading means 31 receives the reproduction command of the first track 5 from the input means 36, the management information storage means 33.
Referring to the start address of the first track 5 of the management information stored in the disk, a command is given to the motor drive means 28 and the optical pickup drive means 30 to move the optical pickup 12 to the start address of the first track 5, First of one
Read the signal on track 5. The signal 13 obtained by reading the disk 1 with the optical pickup 12 is the address 25 and the image data 1 recorded in the sub data by the signal processing means 14.
5. Process and output the audio data 16 recorded in the main data. The address decoding means 32 decodes the address 25 output from the signal processing means 14, and the data reading means 3
Send to 1. The data reading means 31 confirms that it is the start address of the first track 5, and reads the data of the first track 5 (step 43). The read initial image data 15 of the first track 5 is stored in the image data storage means 18. When the initial image data 19 for one screen is stored in the image data storage means 18, the initial image data 19 for one screen is converted from digital to analog by the image DA conversion means 20, and the analog initial image is output from the image output terminal 21. It is output as a signal (step 45). On the other hand, the audio data 16 recorded in the main data is the audio DA conversion means 2
Converted from digital to analog at 3 and audio output terminal 2
4 is output as an analog voice signal. Since no audio data is recorded in the main data corresponding to the sub-data in which the initial image data is recorded, there is no sound while the initial image data is being read (step 4
7). In the next portion where the initial image data of the first track 5 is recorded, the audio data is recorded in the main data and the image data related to the audio is recorded in the sub data. (Step 46). Initial image data is recorded in the sub-data of the first portion of the first track 5, and the audio of the main data is silent. Also,
Since it takes 12 seconds to read the initial image data, there is no sound immediately after the start of reproduction of the first track 5.

[0009]

With such a conventional configuration, even when reproduction is started, there is a long period of time during which no sound for reading the initial image is produced, which gives a feeling of strangeness.

The present invention has been made in view of the above points, and an object thereof is to provide a disc and a disc reproducing apparatus capable of immediately reading an initial image.

[0011]

In order to solve the above-mentioned problems, the disk of the present invention records initial image data and audio data in the main data, and an image associated with the audio of the main data in the sub-data. A data area having one or more tracks for recording data and addresses, and a lead-in area for recording management information of the data area in the sub-data,
The lead-in area, the data area, and the lead-out area are formed in order from the inner circumference, and the main data and the sub-data are recorded by time division multiplexing.

Further, the disc of the present invention has a structure in which the image data flag is recorded in the sub data corresponding to the main data in which the initial image data is recorded.

Further, the disc reproducing apparatus of the present invention comprises an initial image data reproducing means for storing and reproducing and outputting initial image data before reproducing the voice of the disc and the track, and synchronizing with the reproduction of the voice of the track. Image data reproducing means for storing, reproducing and outputting the image data recorded in the sub data.

[0014]

According to the present invention, with the above-described structure, the initial image data recorded in the main data can be immediately read and the time until the initial image is output can be shortened, so that the silent state can be eliminated at the start of reproduction. it can.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a recording structure of a disc of the present invention. Reference numeral 1 is a disc, 2 is a lead-in area in which management information of a data area 3 is recorded in sub-data, and 3 is a plurality of tracks. A data area 4 configured to record audio data is a lead-out area.

Initial image data is recorded in the main data of the first portion of the first track 5. Audio is continuously recorded in the CD format in the next main data, and image data related to the audio of the main data is recorded in the sub data. Further, consecutive addresses are recorded in the sub data of the data area 3. The management information recorded in the lead-in area 2 includes the number of tracks, the recording time of the data area, and the start time of each track. Data is recorded on the second track 6 and the third track 7 in the same format as the first track 5. The image is vertical 216
16 dots per dot, composed of 300 dots horizontally
It is possible to specify the color.

The data capacity of one image is 3 from the equation (1).
It requires 2.4 Kbytes. 216 dots x 300 dots x 4 bits = 259.2 Kbits = 32.4 Kbytes (1) Since the image data transfer rate of main data is 150 Kbytes per second, it is possible to use 0 from Equation (2) to read one screen. ．
It takes 216 seconds.

32.4 Kbytes / 150 Kbytes / second = 0.216 seconds (2) On the other hand, since the image data transfer rate of the sub-data is 2.7 Kbytes per second, the formula (3 ) Takes 12 seconds.

32.4 Kbytes / 2.7 Kbytes / second = 12 seconds (3) FIG. 2 is a block diagram showing the configuration of the disc reproducing apparatus in one embodiment of the present invention. Reference numeral 12 is an optical pickup for extracting a reproduction signal 13 from the disc 1, and 14 is a reproduction signal 1
Signal processing means for processing 3 to separate and output main data and sub data, 17 is image data switching means for switching between main data image and sub data image, 18 is image data storage means for storing image data 15, 20 Is an image DA converting means for converting one screen of image data stored in the image data storing means 18 from digital to analog, 22 is an audio data inhibiting means for inhibiting the output of audio data, and 23 is an audio data 38 from digital. Audio DA converting means for converting into analog, 31 is data reading means for reading data recorded on the disk 1, 32 is address decoding means for decoding address, and 33 is management information recorded in the lead-in area. The management information storage means 34 is an image flag for detecting the image flag of the sub data corresponding to the main data in which the image is recorded. Detecting means, 35 is initial setting means for initializing the reproducing operation, 36 is input means for inputting a track number to be reproduced, 37 is data reading means 31, data decoding means 32, management information storing means 33, image flag detection. It is a control unit composed of five blocks, a unit 34 and an initial setting unit 35.

The reproducing operation of the disc will be described below. FIG. 3 shows a flowchart when the disc of the present invention is reproduced by the disc reproducing apparatus of the present invention.

The disc of the present invention is set in the disc reproducing apparatus of the present invention, and the power is turned on. The optical pickup 12 reproduces the lead-in area 2 and outputs a reproduction signal 13 according to a command from the initial setting means 35. Optical pickup 12
The reproduced signal 13 output from the above is separated into main data and sub data by the signal processing means 14. The management information 26 recorded in the sub data of the lead-in area 22 is read (step 41). The read management information 26 is stored in the management information storage means 33. The track number 1 instructing the reproduction of the first track 5 is input from the input means 36 (step 4).
2). When the data reading means 31 receives the reproduction command of the first track 5 from the input means 36, the management information storage means 33.
Referring to the start address of the first track 5 of the management information stored in the disk, a command is given to the motor drive means 28 and the optical pickup drive means 30 to move the optical pickup 12 to the start address of the first track 5, First of one
Read track 5 signal. The signal 13 obtained by reading the disk 1 with the optical pickup 12 is the address 25, the image data 15 recorded in the sub-data by the signal processing means 14,
The image flag 27 and the main data 16 which is image data or audio data are processed and output. The address decoding means 32 decodes the address 25 output from the signal processing means 14 and sends it to the data reading means 31. The data reading means 31 confirms that it is the start address of the first track 5, and reads the data of the first track 5 (step 43). When the reading of the data of the first track 5 is started, the first
The initial image recorded first in the main data of the track 5 is output as the main data 16, and the image data switching means 1
7b terminal. The image flag detecting means 34 detects the image flag of the sub data corresponding to the main data in which the image data is recorded (step 44), switches the image data switching means 17 to the b terminal, and stores the initial image data in the image data storing means. Send to 18. Further, when the image flag detecting means 34 detects the image flag,
Disable audio output by switching to the terminal. The initial image data is stored in the image data storage means 18. When the initial image data for one screen is stored in the image data storage unit 18, the initial image data 19 for one screen is converted from digital to analog by the image DA conversion unit 20, and the analog initial image signal is output from the image output terminal 21. Is output as (step 45). When the output of the initial image of the first track 5 is completed, the audio data recorded next to the initial image of the main data of the first track 5 is continuously read.
The signal processing means 14 outputs audio data to the main data 16 and image data to the sub data 15. Since the image flag detecting means 34 does not detect the image flag of the sub data corresponding to the main data in which the audio data is recorded (step 44), the image data switching means 17 is switched to the a terminal and recorded in the sub data. The image data is sent to the image data storage means 18, the sound inhibiting means 22 is switched to the terminal b, and the sound data is outputted to the sound DA converting means 23. The image data is stored in the image data storage means 18. When one screen of image data is stored in the image data storage means 18, the image DA conversion means 20 converts the one screen of image data 19 from digital to analog and outputs it from the image output terminal 21 as an analog image signal. It The audio DA converter 23 converts the audio data 38 from digital to analog, and outputs it from the audio output terminal 24 as an analog audio signal. That is, the image related to the voice is sequentially output together with the voice output every 12 seconds (step 4).
6).

In the embodiment of the present invention, after the initial image is output, the image associated with the voice is output. However, after the initial image is output, the image associated with the voice is converted into the initial image. It is also possible to construct by overlapping.

[0023]

As described above, according to the present invention, since the initial image data is recorded in the main data having a high transfer rate, the initial image data can be read in a very short time. This makes it possible to suppress the silent state at the beginning of track reproduction in a short time. Also, when the image data is reproduced as audio data, a large noise may be output and the speaker may be destroyed. Even when the disc of the present invention is played back by a conventional playback device (CD and CD graphic), an image flag is recorded in the image portion of the main data, and the output of voice can be prohibited. It is possible to reproduce the image and sound of the removed part.

The audio data and the image data are recorded on the track subsequent to the initial image data, and the audio data and the image data can be continuously read after the initial image data is read and displayed. There is no need to move and read data again.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a configuration of a disc according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a disc reproducing apparatus according to an embodiment of the present invention.

FIG. 3 is a flowchart for explaining the operation of the disc reproducing apparatus in the embodiment.

FIG. 4 is a schematic diagram showing a configuration of a disc in a conventional example.

FIG. 5 is a block diagram showing the configuration of a disk reproducing device in a conventional example.

FIG. 6 is a flowchart for explaining the operation of the disc reproducing apparatus in the conventional example.

[Explanation of symbols]

 1 Disc 12 Optical Pickup 14 Signal Processing Means 17 Image Data Switching Means 18 Image Data Storage Means 20 Image DA Converting Means 22 Audio Data Inhibiting Means 23 Audio DA Converting Means 28 Motor Driving Means 29 Motors 30 Optical Pickup Driving Means 31 Data Reading Means 32 Address decoding means 33 Management information storage means 34 Image flag detection means 35 Initial setting means 36 Input means 37 Control means

Claims (3)

[Claims] 1. A main data is recorded with initial image data and audio data, and a sub data is a data area having one or a plurality of tracks in which image data and an address related to the sound of the main data are recorded. , A lead-in area in which management information of the data area is recorded in the sub-data, the lead-in area, the data area, and the lead-out area are formed in order from the inner circumference, and the main data and the sub-data are time-division multiplexed. A disc characterized by being recorded with. 2. The disc according to claim 1, wherein the image data flag is recorded in the sub data corresponding to the main data in which the initial image data is recorded. 3. The disk according to claim 1 or 2, an initial image data reproducing means for storing and reproducing initial image data before reproducing the sound of the track, and synchronizing with the reproduction of the sound of the track. A disk reproducing apparatus comprising: an image data reproducing unit that stores and reproduces and outputs image data recorded as sub data.