JPS6343480A - Information reproducing device - Google Patents

Abstract

PURPOSE:To simultaneously reproduce a voice and graphic information multiplexed on a video signal with a video signal by making a user select the kind of a voice signal or character graphic information which is added in the video signal before starting to reproduce the video signal. CONSTITUTION:A user selects the kind of desirable information and inputs it in an information selection device 16. By this input, a digital data process part 14 selects the voice offered by a switch 17. For example, at the time of selecting stereophonic voice in English with an FM voice, the switch 17 is connected to a voice demodulation circuit 8. And at the time of selecting a digital voice, the switch 17 is connected to a low pass filter 12 side and a signal process circuit 10 outputs only necessary digital data to a D/A converter 11. Afterwards a disk controller 13 restarts to reproduce an optical disk 1. Thus, from the time of starting to reproduce the video signal the offer of the selected voice can be accepted.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a playback device that plays back video on a video display device such as a television receiver, and particularly relates to a playback device that plays back video on a video display device such as a television receiver. The present invention relates to an information reproducing device suitable for simultaneously reproducing graphic information.

[Conventional technology]

Conventional equipment includes, for example, magazine/broadcast technology 1985
There is a text multiplex broadcast system shown in Monthly Issues P60 to P73, in which the user selects specific information from a plurality of types of text/graphic information and audio information multiplexed on a video signal. In this case, text/graphic information and audio information unrelated to the video signal are repeatedly transmitted.
If a user needed specific information, all they had to do was select the type of information and then wait for the desired information to be sent.

However, it is conceivable that audio and subtitle information in two or more languages can be multiplexed and recorded and played back, especially in pub-cage media, such as movies and music. No consideration was given to methods for extracting and providing specific information from the information.

[Problem that the invention seeks to solve]

In the above conventional technology, the video signal and the information multiplexed thereto are unrelated, and all the user had to do was select the type of information they needed and then wait until the desired information was sent. Since dialogues, music lines, and subtitles have a close relationship with video, if the type of information to be provided was selected after the video started playing, it would not be possible to select the type of information to be provided at the beginning of the video signal. There was a problem that there was a possibility that information other than the information provided would be provided.

An object of the present invention is to multiplex a plurality of audio signals onto a video signal,
To provide an image reproducing device capable of easily selecting the type of information required by a user from among button information and presenting it together with a video signal.

[Means for solving problems]

The above object is achieved by allowing the user to select the type of audio signal and text/graphic information to be added to the video signal before starting reproduction of the video signal.

[Effect]

Data indicating the type of information multiplexed with the video signal and recorded on the video signal recording medium is recorded on a part of the video signal recording medium, and when the user starts using this device, Based on the data, the display device displays the types of information that can be provided and pauses.

When the user selects the required information, the video signal reproducing device starts reproducing the video signal, extracts the required information from the various information multiplexed on the video signal, and reproduces it along with the video. Users can obtain the information they desire.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG.

In FIG. 1, an optical disc 1 has recorded thereon a video signal, an audio signal multiplexed thereto, and digital data.

The recording spectrum of the signal recorded on the optical disc 1 is
It is shown in the figure. In FIG. 2, 21 is the recorded spectrum of the video signal subjected to 1'M modulation, and 22 and 25 are the recorded spectra of the audio FM signal of the right channel and left channel, respectively.

Further, 24 is a recording spectrum of digital data.

The above signal is recorded on the optical disk 1 and read by the optical pickup 2.

The principles of optical discs are described in "Introduction to Video Discs and DAD" by Corona Publishing, written by Iwamura, and therefore will not be explained here.

The optical disc 1 is rotated by a spindle motor 3 for signal reproduction. The spindle motor 3 and the pickup 2 are controlled by a disk controller 13.

The recorded spectrum 21 of the video signal included in the signal detected by the pickup 2 is extracted by the video signal bandpass filter 4 and demodulated by the video signal demodulation circuit 5 into a video signal B.

Further, the audio signal corresponding to the recording spectrum 22.25 is extracted by the audio signal bandpass filter 7 and demodulated into an audio signal by the audio demodulation circuit 8. One set of audio signal bandpass filter 7 and audio demodulation circuit 8 is required for each of the recording spectra 22 and 25, but since they have the same configuration, they are omitted in FIG. 1 and only one set is shown.

The recorded spectrum 24 of digital data is extracted by a bandpass filter 9 for digital data, and the signal processing circuit 1
0 demodulates digital data. If the audio signal is recorded as digital data, it is converted into analog by the D/A converter 11, and the audio signal is reproduced by the low-pass filter 12.

When audio is recorded as digital data in the same format as a digital audio disc (commonly called a compact disc or CD), two channels of audio signals with 44.1 KHz sampling and 16 bits per sample are recorded. Become.

If the audio signal recorded in the recording spectrum 22 and 23 and the audio signal recorded as digital data in the recording spectrum 24 are different, such as Japanese audio and English audio, the video Before starting signal reproduction, it is necessary to select the type of audio to be provided to the user.

Therefore, the data necessary to select the audio is recorded as digital data at the beginning of the signal recorded on the optical disc 1, and the audio is selected based on the digital data before starting the reproduction of the video signal. do it like this.

Next, an example of the recording format of digital data will be explained.

FIG. 3 shows the recording format of digital data.

Data is treated as one unit per frame of 588 bits. A specific bit bang synchronization signal is added to the beginning of each frame.

When recording digital data, 8-bit data is recorded as 14-bit data by 8-14 conversion, so 1 byte of data is expressed by 14 channel bits. The subcode includes data used to display information related to disc playback control. In addition, 2 pieces of audio signal data are included in one frame.
Contains 8 bytes of 4-byte error correction data.

Furthermore, one block is composed of 98 frames of data. FIG. 4 shows a block diagram.

It is possible to store 2048 bytes of digital data in one block. Furthermore, 288 bytes of system data are used as an error correction code to further improve the reliability of digital data.

When reproduction of the optical disc 1 is started, digital data recorded before the beginning of the signal is first detected by the digital data bandpass filter 9 and the signal processing circuit 10 and sent to the digital data processing section 14. At this point, the recorded spectrum 21°22.23 does not exist, but even if it does exist, it is assumed that there is no signal after demodulation.

FIG. 5 shows an example of the contents of digital data.

The types of head words assigned to the recording spectra 23, 22, 24, etc. are recorded using the data in the table of FIG.

In this example, the recording spectrum 23 has number 1, which indicates that the left channel is recorded in English.

Number 2 indicates the case where the right channel is recorded in English using the recording spectrum 22. Further, numbers 3 and 4 indicate voices based on digital data stored in the recording spectrum 24. Here, it is assumed that two channels are recorded as digital data, with Japanese being recorded on the left channel and Chinese on the right channel.

Here, we are considering storing two channels worth of audio in the digital data recording spectrum 24, but it is also possible to record even more types of audio by performing audio compression.

For example, when storing 8-bit audio per sample instead of 16-bit audio per sample, twice as many types of audio can be recorded. With 8 bits, the audio dynamic range is only 48 dB, but by using the D-PCM method or logarithmic compression/expansion method, it can be increased to 60 dB or 78 dB.
A sufficiently practical dynamic range can be obtained. When increasing the number of voice types as described above, it is also necessary to increase the number of voice types. Also, the compression rate is recorded in the compression rate section.

The digital data processing unit 14 recognizes the data in the table shown in FIG. 5 and displays the data on the information display device 15 as shown in FIG. 6. The display as shown in FIG. 6 may be displayed on a CRT for displaying video signals, or may be displayed to the user on a liquid crystal display, a plasma display, or the like.

In the display in Figure 6, three types of voices are shown,
The sounds recorded as stereo signals such as numbers 1 and 2 in FIG. 5 are displayed all at once. The above processing is performed by the digital data processing section 14.

Further, the digital data processing section 14 displays the information selection data on the information display device 15 and at the same time sends a command to the disk controller 13 to temporarily stop reading the optical disk 1 so that the digital data is recorded following the digital data. to stop the video signal before it starts playing.

Since signals are recorded in a spiral on the optical disc 1, the pickup 2 jumps to one recording track inside when the motor 3 rotates once, thereby temporarily stopping the playback of the optical disc 1. Can be done.

The user selects the type of information desired based on the display as shown in FIG. 6 and inputs it into the information selection device 16. Input is performed using a remote control device, keyboard, or the like.

When an input is made to the information selection device 16, the digital data processing section 14 uses the switch 17 to select the audio to be provided. For example, when selecting English stereo audio using FM audio, the switch 17 is connected to the audio demodulation circuit 8.

Further, when the digital audio number 2 or 3 in FIG. do it like this.

Thereafter, the digital data processing section 14 sends a command to the disk controller 13 to resume playback of the optical disk 1.

Even when multiple types of audio are recorded on the optical disc 1 by multiplexing them with video signals by the above means, the user can easily select the audio signal desired by the user and select it from the start of video signal playback. It becomes possible to realize an information reproducing device that can receive audio.

Next, another embodiment will be described. FIG. 7 is a block diagram of another embodiment of the present invention. In the figure, components 1 to 18 are the same as in FIG. 1.

On the optical disc 1, an audio signal and digital data are recorded multiplexed with a video signal as shown in the recording spectrum of FIG. The audio signals of the left and right channels are recorded in the recording spectra 23 and 22, and the audio signal 18 is reproduced by the audio signal bandpass filter 7 and the audio demodulation circuit 8.

The video signal 6 is transmitted through a video signal filter 4 and a video demodulation circuit 10.
It will be regenerated.

The recorded spectrum 24 of the digital data is extracted by the bandpass filter 9 for digital data, and the signal processing circuit 1
Demodulation of the sidigital data is performed by zero.

Here, a case will be described in which music lyrics and movie subtitle information are recorded as digital data.

In the case of software such as movies produced on ordinary video discs or VTRs, if the dialogue is in a foreign language, subtitles are written directly onto the video. In this case, even if a user who can understand a foreign language does not need subtitles, the subtitles cannot be deleted.

It is also impossible to project subtitles in multiple languages.

Therefore, data such as subtitles is multiplexed and recorded on the video signal so that it can be superimposed (hereinafter referred to as superinvoice) on the video output as necessary. There are two methods of subtitle data: one is to record code information for specifying characters in the recording spectrum 24, and the other is to record the slam image information of the characters as is. Since it is necessary to store the information in a read-only memory or the like, the latter method seems to be suitable for supporting a wide variety of foreign languages, but of course the present invention can also be applied to the former method. be.

In this embodiment, for example, English, Japanese, and Chinese subtitles are recorded as image data.

Image data for subtitles is stored as digital data as shown in the table of FIG. For example, when changing subtitles once every 3 seconds, English data is recorded when the second item in FIG. 4 is a multiple of 3, Japanese data is recorded when it is 3N+1, and Chinese data is recorded when it is 5N+2. Here, N is an integer. When recording music data on a compact disc, the data per second is 44.1K x 16 bits x 2 channels = 17 & 4, which is 7 seconds of bytes. Here, the horizontal 5 is the slam information per screen.
12 dots, 212 dots vertically, 8 per dot
It can be seen that when bit data is given, it is sufficiently possible to send data for one screen in 91 seconds, s1 2 x 21 2'=;108. In reality, subtitles only cover a part of the screen, and the gradation used as subtitle data does not require even 8 bits (256 gradations), so it is also possible to add data other than subtitles.

FIG. 8 shows an example of the storage format of the bang image data.

One screen is decomposed into 512x212 dots and D00 in Figure 4
00 to D2047 each correspond to one dot.

One block in FIG. 4 stores data for four lines.

One screen of data is represented by 53 blocks. In this case, if one character is composed of 16 dots x 16 dots, it is possible to display 32 rows x 15 columns of characters on the entire screen. As for the data content for each dot, for example, data 00 is recorded for a dot that is not to be displayed, and 255 (FF in hexadecimal) is recorded for a dot that is to be displayed.

When starting reproduction of a video signal, first, data for selecting a button recorded before the beginning of the video signal is detected by the digital data bandpass filter 9 and the signal processing circuit 10 and sent to the digital data processing section 14. FIG. 9 is shown as an example of data for selecting a button.

When the digital data processing section 14 receives the button selection data, it sends a command to the disk controller 13 to temporarily stop the reproduction of the optical disk 1.

Next, based on the data in the table of FIG. 9, a display as shown in FIG. 10 is made on the information display device 15 and the user waits for a selection.

The display device 15 may also be a display for video signals.

In that case, the image controller 71 performs the display. The operation of the image controller 71 will be described later.

The user selects the type of subtitles he or she desires using the information selection device 16.
Enter more information. The digital data processing unit 14 not only transmits the selected result to the signal processing circuit 10 but also instructs the disc controller 15 to resume playback of the optical disc 1.

Here, a case will be explained in which number 2 in FIG. 10, that is, Japanese subtitles are selected. Digital data processing section 1
4 can be determined by referring to the table in FIG. 9.The item indicating the seconds of the data of the recording block as shown in FIG. 4 is 3N+1.
The signal processing circuit 10 is informed that the data block pattern indicated by is selected.

The signal processing circuit 10 stores the image data stored in the format shown in FIG. 8 in the image memory 72 through the image controller 71 every three seconds.

The image controller 71 is Book rV published by ASCII Co., Ltd.
This is an integrated circuit that generates an image signal based on the data stored in the image memory as described in ``9938 MSX-VIDEO Technical Data Book'', and it generates a subtitle pattern based on the data obtained from the signal processing circuit 10. generate.

The image controller 71 is “v9938 MSX-
”/IDEO Technical Data Book JP110~P1
It is possible to superimpose (superimpose) a video signal from outside and a video signal generated by the device itself using a circuit such as that shown in 11.

In order to superimpose the video signal from the image controller 71 on the video signal 6, the synchronization signal of the video signal 6 is extracted by the synchronization separation circuit 74, so that the image controller 71 works in synchronization with the video signal 6. There is. Further, the superimpose circuit 75 serves as a switch that selects the video signal 6 when the image controller 71 does not generate a pattern, and selects the signal of the image controller 71 when the image controller 71 generates a pattern. A video signal 75 is generated by superimposing a pattern from a one-image controller 71 on the original video signal 6.

The above means makes it possible to select one of a plurality of types of subtitles for a video signal and display the selected subtitles in a superimposed manner.

It is also conceivable to mix not only subtitle data but also audio signals in the digital data recording spectrum 24 so that even more information can be selected.

Furthermore, the digital data processing unit 14 is provided with a memory for storing information selection data, and by storing the data, the user can select the type of information to be added while reproducing the video signal. Even if you want to change the information, you can change the information to be added without interrupting the reproduction of the video signal.

〔Effect of the invention〕

According to the present invention, even when multiple audio signals and button information are recorded by multiplexing them with a video signal, playback of the video signal can be temporarily stopped and the type of audio and button information to be provided can be selected, resulting in good operability. An information reproducing device can be provided.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of an embodiment of the present invention, Fig. 2 is an explanatory diagram of a recorded spectrum, Fig. 5 is an explanatory diagram showing a recording format of digital data, Fig. 4 is a block diagram, and Fig. 5 is an explanatory diagram of a recording format of digital data. 6 is an explanatory diagram of the contents of digital data, FIG. 6 is an explanatory diagram showing an example of display, FIG. 7 is a configuration diagram of another embodiment of the present invention, and FIG. 8 is an explanatory diagram showing the storage format of the bang image data. ,
FIG. 9 is an explanatory diagram of the data for selecting a button, and FIG. 10 is an explanatory diagram showing an example of the display. 1... Optical disc 2... Pickup 3... Motor 4... Video signal filter 5... Video demodulation circuit 6... Video signal 7... Audio signal filter 8... Audio demodulation Circuit 9...Digital data bandpass filter 10...Signal processing circuit 11...D/A converter 12...Low pass filter 13...Disk controller 141.・Digital data processing unit 15...Information display device 16...Information selection device 17...Switch 18...Audio signal 21...Recording spectrum of video signal 22.25...Recording spectrum of audio signal 24...
Digital data recording spectrum 71...image controller 72...image memory 75...superimpose circuit 74...synchronization separation circuit 75...bump multiplexed video signal. Figure 5 Figure 8 Figure 21

Claims (1)

[Claims] 1. a video signal reproducing device for reproducing a video signal from a recording medium; an individual reproducing means for individually reproducing a plurality of types of audio signals or text/graphic information recorded on the recording medium in a manner superimposed on the video signal; a display means for reading out and displaying type information indicating the type of audio signal or text/graphic information recorded on a recording medium from the recording medium; and displaying a specific audio signal or character from among the type information displayed on the display means. an input means for selecting and inputting the type of graphic information;
selection means for selecting a specific one of the individual reproduction means according to the input type of the audio signal or text/graphic information; and selection means for selecting a specific one of the individual reproduction means according to the input type of the audio signal or text/graphic information; an information reproducing apparatus, comprising: means for temporarily stopping a reproducing operation in the video signal reproducing apparatus while the video signal reproducing apparatus is playing.