JP3289733B2 - Video signal playback device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a video signal according to a format having a main data area and a sub data area, or an audio data area in addition to the main data area and the sub data area.
The present invention relates to a video signal reproducing device for reproducing an audio signal.

[0002]

2. Description of the Related Art Recently, various video image sources have been provided, and users have been given the opportunity to purchase these video image sources as pre-recorded tapes or to record them themselves through broadcast media.

[0003] Among these video sources, for example, in the case of a video source such as a foreign film, in addition to the video source and the original audio signal (foreign language sound), a Japanese subtitle super is provided on the video. There are many. In addition, for example, in a Japanese movie video source, it is convenient to provide, in addition to Japanese audio, a Japanese subtitle super for a person who is deaf, for example.

[0004] Similarly, when trying to learn a foreign language, a video source such as a foreign film is composed of a combination of Japanese audio and English subtitles super, or a video source such as a Japanese film is composed of foreign language audio. It would be advantageous if the source could be played back by a combination of the English and subtitle super.

[0005]

However, in the conventional video signal reproducing apparatus, the user is required to compare the mutual combination of foreign language subtitles and Japanese subtitles with respect to video sources such as foreign films and Japanese films. However, it was impossible to arbitrarily select and watch.

[0006] Similarly, in addition to the mutual combination with the foreign language subtitle super and the Japanese subtitle super, the mutual combination with the foreign language audio and the Japanese audio is also applied to the video source such as the foreign film and the Japanese film. It is impossible for the user to arbitrarily select and watch the relationship.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and it is intended for a user to determine the relationship between a foreign language subtitle superimposition and a Japanese subtitle superimposition with respect to a video source such as a foreign film and a Japanese film. It is an object of the present invention to provide a video signal reproducing apparatus which can arbitrarily select and reproduce.

[0008]

According to a first aspect of the present invention, there is provided a video signal reproducing apparatus comprising a main signal including a video signal and an audio signal on a recording track of a recording medium. A video signal reproducing apparatus that reproduces a video signal and an audio signal based on a format having a main data area for recording a video signal and a sub data area for recording sub-information separately from the main data area. First decoder means for demodulating the main signal including the decoded video signal and audio signal, and demodulating an ID code recorded in a part of the sub data area, and at least two demodulating the ID code recorded in a part of the sub data area. A second decoder for demodulating the type of character information, and an ID obtained by the second decoder
Any one of at least two types of character information similarly obtained by the second decoder means based on the code
And character information priority selection means for selecting as the preferred text information One priority selected by the character information priority selection means
And superimposing means for superimposing the character information to be superimposed on the video signal obtained by the first decoder means. The priority selected by the priority selecting means
Character information other than the
Character information compulsory selection means is further provided.
And the superimposing means includes the character information priority selecting means.
Character information selected by column or character information forced selection means
The video signal obtained by the first decoder means.
Can be superimposed.

[0009]

In the video signal reproducing apparatus of the present invention, the first
The video signal and the audio signal recorded in the main data area demodulated by the decoder
Any one of the at least two types of character information obtained by the decoder means is preferentially selected based on the ID code similarly obtained by the second decoder means, and obtained by the first decoder means in the superimposing means. The preferentially selected character information is superimposed on the selected video signal.

Also, the character information selected by the character information compulsory selection means can be superimposed on the video signal obtained by the first decoder means.

As a result, it is possible to reproduce, for example, a foreign language subtitle superimposition or a Japanese subtitle superimposition on a video image according to the user's preference.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a configuration of a first embodiment when the present invention is applied to a digital video signal recording / reproducing apparatus (video tape recorder), and FIG. 2 shows a configuration of the second embodiment similarly. ing. FIG. 3 schematically shows the tape format configuration.

First, as shown in FIG. 3, a recording track 2 is formed in a helical scan format on a magnetic tape 1 as a recording medium. In one recording track 2, a main data area 3 in which a video signal and an audio signal are recorded, and an audio data area 4 in which an audio signal is recorded following the main data area 3
The audio data area 4 is followed by an ATF area 5 in which a pilot signal for tracking servo is recorded, and a subcode area 6 in which sub information is recorded.

The sub code area 6 is further divided into a plurality of sync blocks 7. Each sync block 7 has a sync signal area 8 in which a sync signal is recorded.
And an ID in which an ID code indicating the type of sub-data is recorded.
It comprises a D code area 9, a sub data area 10 in which sub data such as time code or character information is recorded, and a parity signal area 11 in which a parity signal is recorded.

In the first embodiment shown in FIG. 1, a video signal is supplied from a video signal input terminal 21 to a first encoder unit 20 constituting a main data recording processing unit, and audio signal input terminals 22L and 22R. Thus, a two-channel (stereo) audio signal is supplied. At this time,
When the video source supplied to the video signal input terminal 21 is, for example, a Western movie, the audio signal input terminal 22L
And 22R, the original foreign language audio signal is supplied. When the video source is a Japanese movie, for example, the original Japanese audio signal is supplied as the audio signal supplied to the audio signal input terminals 22L and 22R.

The main data signal subjected to the recording process in the first encoder section 20 is applied to one input terminal of an adder circuit 23.

On the other hand, foreign language subtitle data of subtitle superimposed data, which is sub-information, is supplied to an input terminal 25 of a second encoder unit 24 constituting a sub data recording processing unit. Data is provided to its input terminal 26.

Here, an ID write command signal is supplied to the second encoder unit 24 from a central processing unit (CPU) 27. This ID write command signal is sent to the CPU
The setting is made by operating an operation switch 28 connected to 27, and determines the priority order in reproducing foreign language subtitle data and Japanese subtitle data supplied to the input terminals 25 and 26, respectively. That is, when foreign language subtitle data is reproduced with priority, for example, the LSB of the ID code is set to “1”, and when Japanese subtitle data is reproduced with priority, the LSB of the ID code is set to “0”. Output. The output of the ID code can be sequentially switched to “1” and “0” by a recycle operation of the operation switch 28. This situation can be confirmed by the display unit 29 connected to the CPU 27.

Therefore, the video source to be recorded is
For example, in the case of a foreign image, a mode in which the Japanese subtitle data is preferentially reproduced is set by pushing the operation switch 28 and selecting an ID code whose LSB is “0”. If the video source to be recorded is a Japanese movie, push the operation switch 28 to
By selecting an ID code whose LSB is “1”, a mode is set in which foreign language subtitle data is preferentially reproduced.

The ID code, foreign-language subtitle data, Japanese-language subtitle data, etc., which have been subjected to the recording processing in the second encoder section 24, are time-division-processed and input to the other input of the addition circuit 23. Applied to the edge.
The main data and the sub data added by the adding circuit 23 are amplified by a buffer amplifier 30 and supplied to a write head 31 constituting a rotary head, and are applied to a magnetic tape 1 as a recording medium according to the format shown in FIG. Be recorded.

On the other hand, the reproduced signal read by the read head 32 constituting the rotary head is amplified by a buffer amplifier 33, and then supplied to a first decoder section 34 as first decoder means, and is supplied to a second decoder section 34. It is supplied to a second decoder section 35 as a decoder.

The first decoder section 34 constitutes a main data reproduction processing section.
The baseband video signal is demodulated, and the demodulated video signal is supplied to the superimposer 36 constituting the superimposing means. The first decoder unit 34 demodulates a stereo audio signal in the main data and outputs the demodulated audio signal to audio signal output terminals 37L and 37R, respectively.

On the other hand, the second decoder section 35 constitutes a sub data reproduction processing section, and demodulates an ID code, foreign language subtitle data, Japanese subtitle data and the like from the sub data. ID demodulated by the second decoder unit 35
The code is the CPU that constitutes character information priority selection means.
The subtitle data and the Japanese subtitle data supplied to the subtitle data 27 and demodulated by the second decoder unit 35 are supplied to a subtitle data switching unit 38.

When the LSB of the ID code supplied from the second decoder unit 35 indicates “1”, the CPU 27 sends the foreign language subtitle data to the superimposer 36 to the subtitle data switching unit 38. And outputs a command output to supply the I.sup.
When the LSB of the D code indicates “0”,
A command output is generated for the subtitle data switching unit 38 to supply Japanese subtitle data to the superimposer 36.

As a result, at the time of recording, the recorded ID
Based on the code, either the foreign language subtitle data or the Japanese subtitle data is supplied to the superimposer 36 with priority. Therefore, the superimposer 36
Thereafter, the foreign language subtitle or the Japanese subtitle specified by the ID code at the time of recording is superimposed on the demodulated video signal and output to the video signal output terminal 39.

It should be noted that the CPU 27 and the operation switch 28 connected thereto constitute character information forced selection means during reproduction. In other words, when a foreign language subtitle is superimposed on a video signal and is output during reproduction, a push operation of the operation switch 28 causes the subtitle data switching unit 38 to superimpose Japanese subtitle data. A command output is generated to be supplied to the imposer 36. Further, by further pushing the operation switch 28, a command signal is transmitted to the subtitle data switching unit 38, and the transmission of the subtitle super data from the subtitle data switching unit 38 is stopped. In other words, by operating the operation switch 28 cyclically, an operation of forcibly sequentially switching the mode to the foreign language subtitle, the Japanese subtitle, and the mode without the subtitle is performed.

As described above, according to the embodiment shown in FIG. 1, at the time of recording, which of a plurality of pieces of character information is to be preferentially reproduced is set using the ID code. Appropriate text information is automatically superimposed on the playback video. In the reproduction mode, the operation switch 2 which constitutes the character information forced selection means
By performing a push operation on 8, character information other than the character information automatically selected by the ID code can be selected, and can be used properly according to the user's preference.

FIG. 2 shows the configuration of a second embodiment of the present invention. In FIG. 2, FIG.
The same reference numerals denote the same functional parts, and therefore, the description thereof will be omitted.

In FIG. 2, a two-channel (stereo) audio signal is supplied from a second audio signal input terminal 41L and 41R to a third encoder 40 constituting an audio data recording processor. The input terminal 41L
And 41R are encoded by the third encoder unit 40, and are added together with the main data output from the first encoder unit 20 and the sub data output from the second encoder 24 in the addition circuit 23. Is added.

At this time, when the video source supplied to the video signal input terminal 21 is, for example, a foreign image, the audio signal supplied to the audio signal input terminals 22L and 22R is the original foreign language audio signal. The Japanese audio signal is supplied to the second audio signal input terminals 41L and 41R.

When the video source supplied to the video signal input terminal 21 is, for example, a Japanese movie, the original Japanese audio signal is supplied as the audio signal supplied to the audio signal input terminals 22L and 22R. A foreign language audio signal is supplied to the second audio signal input terminals 41L and 41R.

Here, an ID write command signal is supplied to the second encoder unit 24 from a central processing unit (CPU) 27. This ID write command signal is sent to the CPU
27, which is set by operating the operation switch 44 connected to the terminal 27, and determines the priority order in reproducing foreign language voice and Japanese voice supplied to the audio input terminals 22L, 22R or 41L, 41R, respectively. is there. In other words, if the foreign language voice is played back with priority, the ID
For example, when the MSB of the code is set to “1” and the Japanese voice is reproduced with priority, the MSB of the ID code is output as “0”. The output of the ID code can be sequentially switched to “1” and “0” by reciprocal operation of the operation switch 44. This state is CPU27
Can be confirmed by the display unit 29 connected to the.

Therefore, when the video source to be recorded is, for example, a foreign film, the operation switch 44 is pushed to select the ID code whose MSB is "1", thereby giving priority to foreign language audio. Set to playback mode. If the video source to be recorded is a Japanese movie, push the operation switch 44 to
By selecting an ID code whose MSB is "0", the mode is set to a mode in which Japanese voice is preferentially reproduced.

As described above, the output of the adder circuit 23 is amplified by the buffer amplifier 30 and supplied to the write head 31 constituting the rotary head, and is applied to the magnetic tape 1 as a recording medium in accordance with the format shown in FIG. Be recorded.

On the other hand, the reproduced signal read by the read head 32 constituting the rotary head is amplified by the buffer amplifier 33 and then, as described above, the first decoder section 34 as the first decoder means and the second decoder section. The signals are supplied to a second decoder section 35 as means and a third decoder section 42 as third decoder means, respectively.

The audio data among the reproduced signals supplied to the third decoder section 42 is demodulated into left and right stereo signals by the third decoder section 42 and supplied to the audio signal switching section 43. The audio signal switching section 43 is also supplied with an audio signal in the main data demodulated by the first decoder section 34,
At the time of reproduction, the CPU 27 first determines the MSB of the ID code demodulated by the second decoder unit 35, and
Signal switching unit 4 by command output from
3 causes the audio signal supplied from the first decoder section 34 or the third decoder section 42 to be alternatively output to the audio output terminals 37L and 37R.

Here, when the operation switch 44 constituting the audio signal forcible switching means connected to the CPU 27 is pushed, a command signal is applied from the CPU 27 to the audio signal switching section 43, and the audio signal switching section 43 Switch to an audio signal other than medium and output.

Similarly, in the reproduction mode, each time the operation switch 44 is pushed, the first decoder 34
And the audio signal provided from the third decoder section 42 is alternately output to the output terminals 37L and 37R.

As described above, according to the embodiment shown in FIG. 2, at the time of recording, which of a plurality of pieces of character information is to be preferentially reproduced is set using the ID code. Which of the audio signals is to be preferentially reproduced is set using the ID code.

Therefore, at the time of reproduction, appropriate character information is automatically superimposed on the reproduced video, and an appropriate audio signal is reproduced at the same time. In the reproduction mode, the operation switch 28 constituting the character information forced selection means
By pushing a button, it is possible to select character information other than the character information automatically selected by the ID code, and by pushing the operation switch 44 constituting the audio signal forced switching means, I
An audio signal other than the audio signal automatically selected by the D code can be reproduced.

[0041]

As is clear from the above description, according to the video signal reproducing apparatus of the present invention, the video signal and the audio signal recorded in the main data area demodulated by the first decoder section are processed by the video signal reproducing apparatus. Any one of the at least two types of character information obtained by the two decoder means is preferentially selected based on the ID code similarly obtained by the second decoder means, and the superimposing means selects the character information by the first decoder means. The preferentially selected character information is superimposed on the obtained video signal. It is also possible to superimpose the character information selected by the character information compulsory selection means on the video signal obtained by the first decoder means.

Therefore, for example, a foreign-language subtitle superimposition or a Japanese-language subtitle superimposition can be superimposed on a video and reproduced according to the user's preference.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a first embodiment of a video signal reproducing apparatus according to the present invention.

FIG. 2 is a block diagram showing a configuration of a second embodiment of the video signal reproducing apparatus according to the present invention.

FIG. 3 is a recording format of a signal recorded on a magnetic tape used in the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Magnetic tape (recording medium) 2 Recording track 3 Main data area 4 Audio data area 5 ATF area 6 Subcode area 9 ID code area 10 Subdata area 20 1st encoder part (main data recording processing part) 21 Video signal input terminal 22L, 22R audio signal input terminal 23 addition circuit 24 second encoder unit (sub data recording processing unit) 25, 26 subtitle super data input terminal 27 CPU (central processing unit) 28 operation switch (character information forced selection means) 34 first Decoder unit (main data reproduction processing unit) 35 Second decoder unit (sub data reproduction processing unit) 36 Superimposer (superimposing means) 37L, 37R Audio signal output terminal 38 Subtitle data switching unit 39 Video signal output terminal 40 Third encoder Department (O Audio data recording unit) 41L, 41R second audio signal input terminal 42 third decoder (audio data reproduction process section) 43 the audio signal switching portion 44 an operation switch (audio signal forced switching means)

Claims (2)

(57) [Claims] 1. A format having a main data area for recording a main signal including a video signal and an audio signal on a recording track of a recording medium, and a sub data area for recording sub-information separately from the main data area. A video signal reproducing apparatus for reproducing a video signal and an audio signal by decoding a main signal including a video signal and an audio signal recorded in the main data area; and a part of the sub data area. A second decoder for demodulating an ID code recorded in the sub-data area and demodulating at least two types of character information also recorded in a part of the sub-data area, based on the ID code obtained by the second decoder. And at least two types of character information obtained by the second decoder means. Give priority to one
And character information priority selection means for selecting as character information that gives priority selected by the character information priority selection means
A video signal reproducing apparatus comprising: superimposing means for superimposing character information on the video signal obtained by the first decoder means. 2. The priority selected by the priority selection means.
Manually forcing text information other than the preceding text information
Further provided is a character information forced selection means for selecting, The superimposing means includes the character information priority selecting means or the character information.
The character information selected by the information forced selection means is
Superimposed on video signal obtained by one decoder
2. The video signal reproducing method according to claim 1, wherein
Raw equipment.