JP2549867B2 - Disc playback device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a video disc player, compact (CD-
V) A disc reproducing apparatus represented by a disc player or the like.

[Outline of Invention]

In the present invention, the address of the screen designated in the predetermined reproduction mode is stored in the second memory, and after the reproduction mode ends, the screen of the address stored in the second memory is searched and stored in the first memory. Memorized and displayed.

[Background technology]

Some video disc players have a memory for storing a video signal for one field. In such a video disc player, the video signal reproduced from the disc is output as it is, or the video signal at the timing when a predetermined switch is operated is stored in the memory, and the screen stored in the memory is read and output. You can

On the other hand, when reproducing a CD-V disc in which an audio signal is recorded in a relatively inner audio area and an audio signal and a video signal are recorded in an outer video area, the video area is first reproduced and then reproduced. The applicant previously proposed that the predetermined screen displayed in the memory be stored in a memory and that the screen stored in the memory be displayed as a BGV (background video) when the audio area is played back (Japanese Patent Application No.
−232654).

In a player that reproduces both a video disc and a CD-V disc, it is generally difficult to realize both functions of the video disc and the CD-V disc described above by using one memory. This is because once the BGV screen is stored, it becomes impossible to reproduce the still image of the desired screen that is being reproduced thereafter.

The simplest method to solve this problem is to use two memories for storing at least one field of video signal.
It is to provide one.

[Problems to be solved by the invention]

However, in order to store one screen, a memory having a capacity of at least one field is required, and providing two memories is expensive.

Therefore, the present invention is, for example, a video disc and a CD-V.
In a player that plays both discs, the purpose is to realize it with a single memory for storing at least one field of video signal in order to provide two functions of BGV playback and still image playback of the desired screen. It is what

[Means for solving problems]

A disc reproducing apparatus of the present invention includes a demodulation circuit that demodulates a video signal reproduced from various discs, a first memory that stores at least one field of the video signal from an output of the demodulation circuit, and a demodulation circuit of the demodulation circuit. A switch for selecting one of an output and an output of the first memory, a second memory for storing an address of the video signal, and an input unit operated when a predetermined input is made are provided, and the input unit is provided. When the first operation is performed, the video signal at that time is stored in the first memory, and either the output of the demodulation circuit or the output of the first memory is selectively output by the switch, and the input When a second operation different from the first operation is performed by the means, the address of the video signal at that time is stored in the second memory, and after the reproduction is completed. When the video signal is stored in the first memory, the address stored in the disk is searched based on the address stored in the second memory, and the video signal of the address is stored in the first memory. It is characterized in that it is stored in the memory of.

[Action]

For example, a video (RF) signal reproduced from the video area of a CD-V disc is frequency-demodulated by a demodulation circuit. The output of this demodulation circuit is output via the switch. When the input means is operated during reproduction, the video signal at that time is stored in the first memory for at least one field. By operating the input means to switch the switch, the screen stored in the first memory can be selectively output.
When the input means is operated when the screen to be stored as the BGV screen is reproduced, the address of the screen is stored in the second memory.

When the video area playback mote ends, the address stored in the second memory is searched and the video signal is stored in the first memory before the next transition to the audio area playback mode. The video signal stored in the first memory is read and output as BGV during the audio area reproduction.

〔Example〕

FIG. 1 is a block diagram of a compact (CD-V) disc player of the present invention. When the start of reproduction is input from the input means 15, the control circuit 13 including, for example, a microcomputer controls the drive circuit 17 to move the pickup 1 from the park position at the innermost circumference of the disc toward the video area. The detection circuit 18 outputs a predetermined detection signal to the control circuit 13 when the pickup 1 reaches the video area. When the detection signal is input, the control circuit 13 starts the reproduction of the video area from that position.

The reproduced RF signal output from the pickup 1 is input to the bandpass filter 2, where the FM video signal component is separated. The demodulation circuit 4 frequency-demodulates the FM video signal input from the bandpass filter 2. The output of the demodulation circuit 4 is supplied to a CRT or the like (not shown) via the switch 6 and displayed.

On the other hand, the low pass filter 3 separates the audio signal component from the output of the pickup 1. The demodulation circuit 5 EFM demodulates the output of the low pass filter 3. The output of the demodulation circuit 5 is input to the correction circuit 10 where it is subjected to processing such as dinterleaving and error correction. The output of the correction circuit 10 is the D / A conversion circuit 11
To D / A conversion, and then output to a speaker (not shown) or the like.

While the pickup 1 is reproducing the video area, the user operates a predetermined switch that prompts the first operation of the input means 15 at a desired position while watching the display screen. At this time, the control circuit 13 outputs a signal to the memory 8 such as a field memory or a frame memory. A video signal obtained by A / D converting the output of the demodulation circuit 4 by the A / D conversion circuit 7 is input to the memory 8. The memory 8 outputs at least one video signal at the timing when the control signal is input from the control circuit 13. Memorize fields. At this time, the control circuit 13 turns on the flag that was turned off at the time of starting,
The display means 16 composed of D or the like is controlled to display that the desired screen is stored.

The switch 6 can be switched via the control circuit 13 by operating a predetermined switch that prompts a switching operation of the switch 6 of the input means 15. When the switch 6 is switched to the lower side in the figure, the video signal stored in the memory 8 is D / A converted by the D / A conversion circuit 9 and output. Therefore, a still image is displayed on the CRT or the like. When the switch 6 is switched to the upper side in the figure, the video signal from the demodulation circuit 4 is output as it is. Therefore, at this time, a normal moving image is displayed on the CRT or the like.

Further, when the screen desired to be BGV is displayed on the CRT or the like during the reproduction of the video area, a predetermined switch for prompting the second operation of the input means 15 is operated. At this time, the control circuit 13 stores the address (for example, frame number) read by the reading circuit 12 from the output of the demodulation circuit 4 in the memory 14 such as RAM.
This operation can be performed multiple times. As a result memory 14
A plurality of (for example, 5) frame numbers are stored in.

When the playback of the video area is completed, it is determined whether or not the flag is on, and when it is on (when at least one desired screen is stored), the frame number stored in the memory 14 is It is read and searched.
That is, the control circuit 13 controls the drive circuit 17 to move the pickup 1 into the video area. The reading circuit 12 reads the frame number from the output of the demodulation circuit 4 and outputs the result to the control circuit 13. When the same frame number as the frame number stored in the memory 14 is detected, the control circuit 13 controls the memory 8 to store the video signal corresponding to the frame number for at least one field. The stored video number is immediately read out, D / A converted by the D / A conversion circuit 9, and then output via the switch 6.

When a plurality of frame numbers are stored in the memory 14, one screen is output for a predetermined time (for example, several seconds), the next screen is searched, and the operation of outputting for a predetermined time is repeated. For example, five screens are displayed for 3 seconds and then the next screen is displayed, and the first screen is displayed after the last screen.

While the display screen is changing in this manner, if the predetermined switch of the input means 15 is operated at the timing when the desired screen is displayed, the search storage operation is terminated and the video signal stored in the memory 8 is fixed. To be done.

When the video signal of the memory 8 is selected, or when the video signal is stored in the memory 8 when only one frame number is stored in the memory 14, the control circuit 13 controls the drive circuit 17 and the pickup. 1 is driven in the innermost direction of the disc to search the audio area.
When the pickup 1 reaches the audio area, the detection circuit 18 outputs a detection signal. At this time, the control circuit 13 controls the pickup 1 to reproduce the audio area. The reproduced audio signal is D /
It is output from the A conversion circuit 11. In this way memory 8
The signal in the audio area is reproduced while the video signal stored in is output as a still image.

When the reproduction of the audio area is completed, it is determined whether the flag is on or off. When the flag is on,
The state of waiting for input of the next reproduction start is entered, and the data stored in the memory 8 is not erased. Therefore, even if the disk is replaced, the screen once stored is read and displayed in the audio area unless a new operation is performed.

When the flag is off (when the user does not store the screen during the video area reproduction), when the reproduction of the video area is completed, a predetermined address set in advance is searched. This address is stored in advance in the memory 14 when the player is manufactured. Of course, the address can be changed to a predetermined value by operating the input means 15. However, this address is the address of the video area.

During the search operation, the reading circuit 12 reads the frame number from the output of the demodulation circuit 4 and outputs the reading result to the control circuit 13. When the same frame number as the frame number stored in the memory 14 is detected, the control circuit 13 stores the video signal of that frame number in the memory 8.

Instead of storing a specific frame number in the memory 14, it is possible to store, for example, the first frame of the video area, the frame of a predetermined track of the video area, or the like.

When the flag is off, the data in the memory 8 is erased when the reproduction of the audio area is completed. Therefore, for example, when the disc is exchanged, the screen displayed in the audio area also becomes a video signal from the disc after the exchange.

The above operation is shown in the flowchart of FIG. Incidentally, the switch operation determination step in the flow shown in the figure is to determine whether or not the second operation by the input means 15 is performed.

The present invention can be applied to the case of reproducing a video disc. In this case, since there is no audio area, when one video signal for BGV is specified, it enters the state of waiting for the next input.

〔effect〕

As described above, according to the present invention, for example, in a player that reproduces both a video disc and a CD-V disc,
When the BGV output is performed, the address stored in the second memory is searched, and the video signal of this address is first
BGV output is enabled by storing it in the memory of, and when a still image of the desired screen of either the video disc or the CD-V disc is played back, it is stored in the single memory for storing the video signal. By storing a video signal for at least one field, it is possible to reproduce a still image of a desired screen. Therefore, in order to provide two functions of BGV reproduction and still image reproduction of a desired screen, at least one field Can be realized with a single memory for storing the video signal of, and cost reduction can be achieved.

[Brief description of drawings]

 FIG. 1 is a block diagram of the disc player of the present invention, and FIG. 2 is a flowchart thereof. 1 …… Pickup 2 …… Bandpass filter 3 …… Lowpass filter 4,5 …… Demodulation circuit 6 …… Switch 7 …… A / D conversion circuit 8 …… Memory 9 …… D / A conversion circuit 10 …… Correction Circuit 11 …… D / A conversion circuit 12 …… Reading circuit 13 …… Control circuit 14 …… Memory 15 …… Input means 16 …… Display means 17 …… Driving means 18 …… Detection circuit

Front Page Continuation (72) Inventor Kenichiro Yasukawa 426-10 Hanazono, Tokorozawa, Saitama Prefecture Tokorozawa Plant, Pioneer Corporation (56) Reference JP 58-68386 (JP, A) JP 57-76653 (JP 57-76653) JP, A)

Claims (1)

(57) [Claims] 1. A demodulation circuit for demodulating a video signal reproduced from various discs, a first memory for storing at least one field of the video signal from an output of the demodulation circuit, an output of the demodulation circuit or the A switch for selecting one of the outputs of the first memory, a second memory for storing the address of the video signal, and an input unit operated when performing a predetermined input are provided. When an operation is performed, the video signal at that time is stored in the first memory, and one of the output of the demodulation circuit or the output of the first memory is selectively output by the switch, and the input unit outputs the video signal. When a second operation different from the first operation is performed, the address of the video signal at that time is stored in the second memory, and after the reproduction is finished, the first operation is performed. When a video signal is stored in the memory, the address stored in the disk is searched based on the address stored in the second memory, and the video signal of the address is stored in the first memory. A disk reproducing device characterized by the above.