JPH0426955A - Optical disk and information signal recording and reproducing device - Google Patents

Abstract

PURPOSE:To widen the range of conditions capable of scenario reproducing for alternately reading and reproducing two kinds of information signals and to quicken the changeover time of regenerative signals by recording one information signal out of the two information signals in an approximately middle part between the inner circumferential part and the outer circumferential part in the radial direction of a disk. CONSTITUTION:When an information signal is to be recorded on an optical disk 11, a recording and reproducing part 17 is operated by a control part 18 with an operating input from an operating part 20, and a video information signal is recorded in an area 13a of the inner circumferential part of the optical disk first, and subsequently an audio information signal is recorded in an area 12 of the middle part, and finally a video information signal is recorded in an area 13b of the outer circumferential part. Thus, the audio information signal recording area is provided in the area 12 in the approximately middle part between the inner circumferential part and the outer circumferential part in the radial direction of the disk and is recorded. By this method, the max. access time between the audio information signal and the video information signal areas can be reduced by half, and the range of conditions capable of scenario reproducing is widened, and also the changeover time for videos can be quickened.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an optical disc for recording two different types of information signals on one disc and an information signal recording/reproducing apparatus.

BACKGROUND OF THE INVENTION In recent years, two different types of information signals, such as image information signals and audio information signals, are recorded on a recording medium, and the audio is continuously played back while images are switched one after another on a display screen.
In the case of scenario playback (hereinafter referred to as scenario playback), two types of information signals are often recorded on separate recording media such as optical disks or magnetic tapes and played back in synchronization.

As another method, the scenario can be reproduced by digitally recording the audio information signal and the image information signal on one optical disc, and then taking in the information signals alternately using a memory during reproduction.

The method for reproducing the latter scenario described above will be described below with reference to the drawings.

FIG. 3 shows an information signal recording area on one optical disk, with the hatched area being the audio information signal recording area and the other areas being the image information signal recording area.

FIG. 4 is a timing chart when a scenario is played back in a conventional information signal recording/playback device (not shown), in which a indicates an audio information signal reading period from a disc, b indicates a continuous audio playback output, and C indicates a period for reading an audio information signal from a disc. The image information signal reading section, d, represents the image reproduction output.

The time of the audio information signal reading section is T^, the time of the image information signal reading section is Tν, the audio signal playback time corresponding to the audio information signal reading section is TPB, and the time of the pickup for reading the audio and image information signals recorded on the disc. Assuming that the maximum access time is Ts, the conditions under which scenario playback is possible are T^+Tν+2TS≦TPB
...(1). Furthermore, when scenario playback is possible, the image switching time TON is at least TPB.

On the other hand, in the optical disc shown in FIG. 3, if the maximum access time from the audio information signal area on the inner circumference of the disc to the image information signal area on the outer circumference is T wax, then the maximum access time of the two information signal areas 'fl T s" is 'rs'='r■&X
...(2). At this time, the minimum value TCH' of the image switching time when scenario playback is possible is as follows: Tce'=T^+τ+275''TA+Tv+2Tmax·-(3).

Problems to be Solved by the Invention However, in the conventional information signal recording and reproducing device, as is clear from the above equation, the conditions under which scenario playback is possible and the image switching time depend on the access time Ts. had the problem that the scenario could not be played back in some cases.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to provide an optical disc and an information signal recording/reproducing device that can widen the range of conditions that enable scenario playback and speed up image switching times. be.

Means for Solving the Problems In order to achieve the above objects, the optical disc and information signal recording/reproducing apparatus of the present invention transmits one of two different information signals from the inner circumference in the radial direction to the outer circumference of the disk. The recording is made approximately in the center between the two.

Effect of the Invention With the above-described configuration, the present invention can shorten the access time between two different information signal areas, thereby widening the range of conditions that enable scenario playback, and shortening the image switching time. can.

Embodiment Hereinafter, an optical disc and an information signal recording/reproducing apparatus according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows the recording area of the information signal on the optical disk, where 11 is the optical disk, the shaded area 12 is the audio information signal recording area, and the other areas are the inner circumferential part 13a and the outer circumferential part 13b.
is the image information signal recording area.

FIG. 2 is a schematic diagram of an information signal recording/reproducing apparatus for recording information signals on the optical disc 11 or reproducing information signals therefrom. 11 is an optical disk, 14 is a motor for rotating the optical disk 11, 15 is an optical pickup, and 16 is an optical pickup 15 for rotating the optical disk 1.
1 is a drive unit that drives in the radial direction; 17 is a recording/reproducing unit;
8 is a control unit that controls the motor 14, the drive unit 16, and the recording/reproducing unit 17; 19 is a memory provided in the control unit 18;
20 is an operation section.

Next, the operation of the above embodiment will be explained. optical disc 1
1, the control unit 18 operates the recording and reproducing unit 17 by operation input from the operation unit 20,
The image information signal is first transmitted to the inner peripheral area 13 of the optical disc 11.
a, then an audio information signal is recorded in the central region 12, and finally an image information signal is recorded in the outer peripheral region 13b. In the case of reproduction, the control unit 18 operates the recording and reproducing unit 17 by the manual operation from the operation unit 20, and after reproducing, for example, a certain part of the audio information signal in the central area 12, the image in the inner peripheral area 13a is reproduced. After reproducing the information signal, then reproducing another part of the audio information signal in the central region 12, and then reproducing the image signal in the outer peripheral region 13b, the information is stored in the memory 19 of the control section 18. Access alternately while temporarily storing.

When reproducing the optical disc 11, the maximum access time TS between the two important information signal areas 12 and 132, 13b is the maximum access time from the inner circumference to the outer circumference of the optical disk 11, which is 7'. If X, T s= T--x/2-(
4). Moreover, the minimum value Tco of the image switching time is Te
1l = TA + TV + 2 Ts = TA + TV + T - ax (5). Therefore, the image switching time can be made faster by the amount that the maximum access time is halved compared to the conventional method.

As described above, according to this embodiment, by providing and recording the audio information signal recording area in the approximately central area 12 between the radially inner circumference and the outer circumference of the disc, the audio information signal recording area and The maximum access time between image information signal recording areas can be halved, and the range of conditions that enable scenario playback can be expanded.

In the above embodiment, it is also possible to reverse the areas 13a and 13b for recording image information signals and the area 12 for recording audio information signals, and obtain the same effect as in the above embodiment. be able to.

Furthermore, the above-mentioned information signals are an image information signal and an audio information signal, but are not limited to these, and two types of information signals such as different types of audio information signals, an audio information signal and a program, an image information signal and a program, etc. A disk can be constructed by combining these disks, and it is also possible to apply it to an information signal recording/reproducing device using such a disk. In any case, at least one of the information signals must be a digital signal.

Effects of the Invention As described above, according to the present invention, by recording one of the two types of information signals approximately in the center between the inner circumference and the outer circumference in the radial direction of the disk, two types of information signals can be recorded. The range of conditions that enable scenario playback in which information signals are read and played back alternately can be expanded, and the switching time of playback signals can be made faster.

[Brief explanation of drawings]

FIG. 1 is a schematic plan view showing an information signal recording area on an optical disk in an embodiment of the present invention, and FIG. 2 is a schematic block diagram of an information signal recording and reproducing apparatus in an embodiment of the present invention.
FIG. 3 is a schematic plan view showing an information signal recording area on a conventional optical disk, and FIG. 4 is a timing chart when reproducing a scenario in a conventional information signal recording/reproducing apparatus. 11... Optical disc, 12... Audio information signal recording area, 13a, 13b... Image information signal recording area, 14
...Motor, 15...Optical pickup, 16...
Drive unit, 17... Recording and reproducing unit, 18... Control unit, 1
9...Memory, 20...Operation unit. Figure 1 IIPJ2 Figure

Claims (3)

[Claims] (1) An optical disc characterized in that one of two different types of information signals is recorded approximately in the center of the disc from the inner radial part to the outer periphery. (2) An information signal recording/reproducing device characterized in that one of two different types of information signals is recorded approximately at the center of the disk from the inner circumference to the outer circumference in the radial direction. . (3) The information signal recording/reproducing apparatus according to claim (2), wherein at least one of the information signals is digitally recorded, and a memory is used to take in the information signals alternately during reproduction.