JPS62234474A - Still picture reproducing device - Google Patents

Abstract

PURPOSE:To attain the simultaneous reproduction of both still pictures and voices by using a medium to which these still pictures and voices are recorded together with the information codes showing the recorded positions of voices, a still picture/voice reader, a still picture memory device and a controller for the voice reader. CONSTITUTION:The still picture video signals and sound signals are recorded on different tracks of an optical disk medium 1. The start/end time code AC of the sound signal as well as the video time code VTC are superposed on the video signal. Then the voice time code ATC is superposed on the sound signal. A central control circuit 21 actuates a still picture reproducer with designation of the code VTC. The video signals are written to a memory 8 via an HPF 4, a changeover switch and a video demodulation circuit 6. Then the still pictures are reproduced by a minitor 11 and the code VTC is demodulated by a demodulation circuit 15 for the low frequency component separated by an LPF 14. Then the code AC is demodulated by a demodulation circuit 18. These demodulated codes are sent to the circuit 21. The circuit 21 shifts the tracing position of an optical head 2 to attain the coincidence with the start time code of the sound signal. The sound signal is also separated by the HPF 4 and the LPF 14 and their high frequency components are demodulated into sound signals by a voice demodulation circuit 12 via a switch 5. While the low frequency components are demodulated into the code ATC by the circuit 15 and sent to the circuit 21. This operation is repeated until the coincidence is attained with the end time code of the sound signal.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a still image reproducing device that reproduces still images.

BACKGROUND OF THE INVENTION Conventionally, VTRs have been used as image playback devices capable of playing back still images.
, video disc players, optical disc devices, etc.

Problems to be Solved by the Invention However, conventional image reproducing devices can simultaneously reproduce audio while reproducing moving images, but do not reproduce audio when reproducing still images. Therefore, the amount of information provided during still image playback is reduced, and it is difficult to accurately convey the intentions of the still image creator.

SUMMARY OF THE INVENTION An object of the present invention is to provide a device that can reproduce audio related to a still image while the still image is being reproduced.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention records a plurality of still images, audio related to each still image, and an information code indicating the location where the audio is recorded. a reading device layer for reading out still images and audio, a storage device for storing the read still images, and a reading device for reading audio related to the still images); The system adopts a configuration consisting of a control device that

Function The present invention employs the above-mentioned configuration. First, an information code indicating a position where a still image and audio related to the still image are recorded is read from the medium by a reading device. The still image is then stored in the storage device and continues to be played back. While the still image is being reproduced, the control device controls the reading device using the above-mentioned information code to read out and reproduce the audio related to the still image, so that the still image and the audio can be replayed simultaneously.

Example Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an optical disc playback system including a still image playback device of the present invention.

In FIG. 1, reference numeral 1 denotes an optical disk medium, on which a plurality of still image video signals and audio signals are recorded on separate tracks. The video signal includes the video time code VTC and the start/end time code A of the audio signal related to the still image.
C is superimposed on the audio signal, and the audio time code A is superimposed on the audio signal.
TC is superimposed. 2 is an optical head for detecting signals from the optical disk medium 1; 3 is preamplifier, 4
is a high-pass filter, and 14 is a low-pass filter.

6 is a video demodulation circuit, and 12 is an audio demodulation circuit.

7 is an A/D converter that converts a video signal into digital data, and 10 is a D/A converter that converts digital data into an analog video signal. A memory 8 stores digital data converted by the A/D converter 7. Reference numeral 9 denotes a memory control circuit that controls writing and reading of the memory 8.

11 is a monitor, and 13 is a speaker. Reference numeral 5 denotes a video/audio changeover switch, and the video demodulation circuit side is closed until the video signal is detected by the optical head 2 and written into the memory 8, and the audio demodulation circuit side is closed while the audio signal is being reproduced. 15 is a demodulation circuit for demodulating the video time code VTC and audio time code ATC; 18 is a demodulation circuit for demodulating the start/end time code AC of the audio signal related to the video signal. 17 is a disk rotation drive mechanism for rotating the optical disk medium 1, and 16 is a disk rotation servo for controlling the number of rotations of the disk. 2o is optical head 2
19 is a tracking servo for controlling the tracing position. 22 is a control panel for specifying a still image that the user wants to see; 21
are memory control circuit 9, video/audio changeover switch 5
, the disk rotation servo 16, and the tracking servo 19.

When a still image output command specifying the video time code VTC is input to the control panel 22, the central control circuit 22
1 uses the disk rotation servo 16 to operate the disk rotation drive mechanism to rotate the optical disk medium 1 at a predetermined number of rotations, and uses the tracking servo 19 to operate the optical head moving mechanism 20 to obtain the desired still image video signal. The optical head 2 is moved so as to trace the recorded portion.

The signal detected by the optical head 2 is amplified by a preamplifier 3, and then separated into high frequency components and low frequency components by a high pass filter 4 and a low pass filter 14. Since the video/audio changeover switch 5 is closed on the video demodulation circuit 6 side at this time, the high frequency component is demodulated by the video demodulation circuit 6, converted to digital data by the A/D converter 7, and written into the memory 8.

Thereafter, the data for one frame written in the memory 8 is repeatedly read out, converted back to an analog video signal by the D/A converter 10, and still images are continued to be reproduced on the monitor 11.

On the other hand, the low frequency component separated by the low pass filter 14 is demodulated into the video time code VTC by the demodulation circuit 15.
Start/end time code AC of audio signal in demodulation circuit 18
is demodulated and sent to the central control circuit 21.

The center m circuit 21 operates the optical head moving mechanism 20 using the tracking servo 19 to move the trace position of the optical head until it matches the start time code of the audio signal.

Similarly to the video signal described above, the audio signal is detected by the optical head 2 and is amplified by the preamplifier 3, and separated into high frequency components and low frequency components by the high pass filter 4 and the low pass filter 14. This time, the video/audio changeover switch 5 is closed on the audio demodulation circuit 12 side, so the high frequency component is demodulated into an audio signal by the audio demodulation circuit 12 and output to the speaker 1.
It is played in 3.

On the other hand, the low frequency component is processed by the demodulation circuit 15 as the audio time code A.
The TC is demodulated and sent to the central control circuit 21. This is continued until the time code matches the end time code of the audio signal, so that it is possible to reproduce the audio related to the still image while the still image is being reproduced.

The medium is not limited to the optical disk medium shown here, but other media such as magnetic disk media can also be used. In this case, a reading device compatible with the medium may be used, such as a magnetic head.

Effects of the Invention As described above, in the present invention, since still images and audio can be played back at the same time, a large amount of information is provided to the user, which has the effect of deepening the understanding of the information.

Furthermore, as shown in the embodiments, since the present invention includes a still image storage device, it is possible to
It is not necessary to make each frame correspond to one track, and it also has the effect of being able to support playback of high-density recorded media.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an optical disc reproducing system including a still image reproducing apparatus of the present invention as an embodiment of the present invention. 1... Optical disk medium, 2... Optical head, 3...
Preamplifier, 4... High-pass filter, 5... Video/audio changeover switch, 6... Video demodulation circuit, 7.
...A/D converter, 8...Memory, 9...Memory control circuit, 10...D/A converter, 11...Monitor, 12...Audio demodulation circuit, 13... speaker,
14...Low pass filter, 15...Demodulation circuit, 1
6... Disk rotation servo, 17... Disk rotation drive mechanism, 18... Demodulation circuit, 19... Tracking servo, 20... Optical head moving mechanism, 21... Central control circuit, 22...・Control panel 0

Claims (1)

[Claims] A medium in which a plurality of still images, audio associated with each of the still images, and an information code indicating the position where the audio is recorded are recorded, and the still images, audio, and information recorded on the medium. a reading means for reading a code; a storage means for storing a still image read out by the reading means; and controlling the reading means so as to read out audio related to the still image read out by the reading means. A still image playback device comprising a control means.