JPH09154093A - Video/audio reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for slowly reproducing only the section containing a voice in an audio signal when reproducing a software for which superimposed character information is inserted into video signals. SOLUTION: Concerning a video/audio reproducing device for reproducing the software for which video signals and audio signals are stored and the superimposed character information is inserted into the video signals, this device is provided with a block discriminating part 3, speech speed changing part 4 and means 30 for extracting the superimposed character information from the input video signals from the software and when no superimposed character information is extracted, the input audio signals from the software are outputted without changing speech speed. Besides, when the superimposed character information is extracted, the input audio signals from the software are outputted while changing speech speed so as to decelerate the speech speed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a broadcast, a video tape, a digital video disc, a laser which includes a video signal and an audio signal and has subtitle information inserted in the video signal, such as a closed caption system. The present invention relates to a video / audio reproducing device for reproducing software such as a disc.

[0002]

2. Description of the Related Art A closed caption system is a system capable of displaying subtitles corresponding to audio.
In the closed caption system, a signal representing subtitles (CC signal: closed caption signal) is inserted within a vertical blanking period of a video signal. C during playback
The caption is displayed by extracting the C signal and generating the caption video.

Since such a system can display subtitles corresponding to voice, it is suitable for language learning. For example, a video tape for learning English in which a CC signal is inserted within a vertical blanking period of a video signal is already on sale. When such a video tape is played back by a playback device equipped with a decoder for extracting CC signals, subtitles corresponding to audio are displayed together with video.

[0004]

DISCLOSURE OF THE INVENTION According to the present invention, when reproducing software (broadcast, video tape, digital video disk, laser disk, etc.) in which subtitle information is inserted in a video signal, the sound of the audio signal is It is an object of the present invention to provide a video / audio reproducing device capable of slowly reproducing only the included portion.

Further, according to the present invention, when reproducing software (broadcast, video tape, digital video disk, laser disk, etc.) in which subtitle information is inserted in a video signal, only an audio portion including a keyword designated by a user is reproduced. An object of the present invention is to provide a video / audio reproducing device capable of slowly reproducing.

[0006]

A first video / audio reproducing apparatus according to the present invention reproduces software in which a video signal and an audio signal are stored and caption information is inserted in the video signal. In the device, means for extracting subtitle information from the input video signal from the software, and when the subtitle information is not extracted, the input audio signal from the software is output without converting the speech speed, and the subtitle information is extracted. In some cases, a voice output means is provided for converting a voice speed of an input voice signal from the software so as to reduce the voice speed, and outputting the voice signal.

In the first video / audio reproducing apparatus according to the present invention, when the caption information is extracted, the input audio signal from the software is converted in the speech speed so as to be slowed, and then output. Only the audio part of the input audio signal can be slowly reproduced.

A second video / audio reproducing apparatus according to the present invention is a video / audio reproducing apparatus for reproducing software in which a video signal and an audio signal are stored and subtitle information is inserted in the video signal, in which a keyword is input. Input means for doing, extracting means for extracting subtitle information from the input video signal from the software, input keyword, determining means for determining whether or not the subtitle information extracted by the extracting means, always, The input voice signal from the software is output without converting the voice speed, and when the determination unit determines that the keyword and the subtitle information match, the voice speed of the input voice signal from the software becomes slow for a certain period of time. Thus, it is characterized in that it is provided with a voice output means for converting the speech speed and outputting it.

In the second video / audio reproducing apparatus according to the present invention, when the determining means determines that the keyword and the subtitle information match, the voice speed of the input audio signal from the software becomes slow for a certain period of time. Since the speech speed is converted and output as described above, only the voice portion including the keyword of the input voice signal can be slowly reproduced.

[0010]

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

FIG. 1 shows a schematic structure of a video / audio reproducing apparatus for reproducing a video tape including a video signal and an audio signal and having caption information inserted in the video signal.

It is assumed that the videotape 1 in which the subtitle information for audio is inserted in the video signal is an English learning tape. The video signal read from the video tape 1 is sent to the video / caption reproducing device 2 for reproducing the video and the caption. The video / caption reproduction device 2 includes a video reproduction unit 21 for reproducing a video signal, a caption video generation unit 22 that includes caption information extraction unit 30 that extracts caption information, and a video reproduction unit 21. And a combining unit 23 that combines the output of the subtitle video generation unit 22.

The audio signal read from the video tape 1 is sent to the speech speed conversion section 4. The subtitle information extracted by the subtitle information extraction unit 30 of the subtitle video generation unit 22 is also sent to the section determination unit 3. The section determination unit 3 determines the period in which the caption information is sent from the caption information extraction unit 30 as the audio section in which audio is output, and the caption information extraction unit 30
The period in which the subtitle information is not sent is determined to be a non-voice section with no voice. The non-voice section includes a section in which only noise exists, a section in which back music is played but no sound exists, and the like. The section determination unit 3 sends a signal indicating whether the input voice signal is a voice section or a non-voice section (hereinafter referred to as a section determination signal) to the signal processing unit 42 (see FIG. 2) of the speech speed conversion unit 4. send.

FIG. 2 shows an example of the structure of the speech speed converter 4.

The speech speed conversion unit 4 comprises a voice signal input unit 41, a signal processing unit 42, a voice memory 43, a storage amount calculation unit 44 and a voice signal output unit 45. Signal processing unit 42
Includes a time axis compression / expansion unit 51, a deletion unit 52, and the like.

The audio signal input section 41 includes, for example, an amplification section, an A / D conversion section, a frame memory and the like. The signal input to the audio signal input unit 41 is amplified,
It is converted into a digital signal and stored in the frame memory. The output of the audio signal input unit 41 is sent to the signal processing unit 42. In this embodiment, the case where an analog signal is input to the voice speed conversion unit 4 has been described, but a digital signal read from an IC memory or the like may be input to the voice speed conversion unit 4. In this case, the A
It is not necessary to provide the / D converter.

When the determination signal indicating the voice section is sent from the section determination unit 3 to the signal processing unit 42, the input voice signal is time-axis compression / decompression unit 51 in order to slow down the speech speed.
The extension processing is performed at an extension rate of 1 or more, for example, an extension rate of 1.5. That is, the 2-pitch cycle of the voice is extended to the 3-pitch cycle. The decompressed audio signal is output via the audio memory 43 and the audio signal output unit 45. At an expansion rate of 1.5, the voice output is 2 at the standard voice speed.
/ 3 times. However, the pitch remains unchanged.

The amount of audio data stored in the audio memory 43 but not yet read (unread data storage amount) is calculated by the audio data storage amount calculation unit 44. The unread data storage amount calculated by the storage amount calculation unit 44 is sent to the signal processing unit 42.

When the determination signal indicating the non-voice section is sent from the section determination unit 3 to the signal processing unit 42, the unread data storage amount sent from the storage amount calculation unit 44 is equal to or more than a predetermined value. It is determined whether or not. When the unread data storage amount is less than the predetermined value, the signal processing unit 42
Sends the input voice signal to the voice memory 43 as it is without decompressing it. When the unread data storage amount is equal to or larger than the predetermined value, the signal processing unit 42 deletes the input audio signal.

The audio signal output section 45 includes a D / A conversion section. The digital signal sent from the audio memory 43 to the audio signal output unit 45 is converted into an analog signal and output from the audio signal output unit 45. In this embodiment, the case where the voice signal is output as an analog signal from the voice speed conversion unit 4 is shown, but the voice signal may be output as a digital signal from the voice speed conversion unit 4. In this case, it is not necessary to provide the audio signal output unit 45 with the D / A conversion unit.

According to the above embodiment, it is possible to slowly reproduce only the portion of the audio signal containing the audio.

FIG. 3 shows another video / audio reproducing apparatus. In FIG. 3, the same parts as those in FIG. 1 are designated by the same reference numerals and the description thereof will be omitted.

This video / audio reproducing apparatus slowly reproduces only the audio portion containing the keyword input by the user.

The user inputs a keyword using the input device 11. The input keyword is converted into character information by the character information conversion unit 12 and stored in, for example, a buffer. When the playback of video tape 1 is started,
The comparison unit 13 compares the character information extracted from the video signal by the caption information extraction unit 30 with the keyword (keyword converted into character information). Comparison unit 13
When the character information extracted from the video signal by the subtitle information extraction unit 30 matches the keyword, the keyword detection signal is sent to the signal processing unit 42 (see FIG. 2) of the speech speed conversion unit 4.

The voice speed converter 4 always sends the input voice as it is to the voice memory 43. Then, when the keyword detection signal is sent from the comparison unit 13, the input voice signal is expanded by the time axis compression / expansion unit 51 for a certain period and sent to the sound memory 43. Therefore, only the voice part including the keyword input by the user can be slowly reproduced. When the unread data storage amount calculated by the storage amount calculation unit 44 becomes a predetermined value or more,
The voice memory 43 is cleared.

The above has described the example in which the present invention is applied to the language learning device for slowing down the speech speed of the voice reproduced at the standard speed. However, the present invention realizes the high speed reproduction for the purpose of saving time. Is also available. For example, VTR N
Double speed reproduction will be described as an example.

When the reproduction speed is N times, the output sound is reproduced by compressing the section in which the caption information is output or the voice portion including the keyword input by the user at a compression rate higher than 1 / N. Slow down. And
The section in which the subtitle information is not output or the voice portion which does not include the keyword input by the user may be muted so that the voice output is not output, or may be output simply by returning the pitch.

For example, when the reproduction speed is double speed, the following is performed. The section in which the subtitle information is output or the audio portion including the keyword input by the user is compressed at a compression rate of 1/2 or more, for example, 2/3. That is, the 3-pitch cycle is thinned out to the 2-pitch cycle. In this case, the output voice becomes 3/2 times the standard voice speed. However, the pitch remains unchanged.

Then, for the section in which the subtitle information is not output or the voice portion which does not include the keyword input by the user, one of the following two processing methods is performed. The first processing method is to prevent audio output.
Mute. The second processing method simply returns the pitch and outputs it. In the case of double speed reproduction, the sound signal may be compressed at a compression rate of 1/2 to simply restore the pitch. In other words, the 2-pitch cycle may be thinned out to the 1-pitch cycle. By doing so, the output voice becomes double the standard voice speed, and only the pitch is restored.

[0030]

According to the present invention, when reproducing the software in which the caption information is inserted in the video signal, only the portion of the audio signal containing the audio can be slowly reproduced.

According to the present invention, when the software in which the subtitle information is inserted in the video signal is played back, only the audio part including the keyword designated by the user can be played back slowly.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a schematic configuration of a video / audio reproduction device.

FIG. 2 is a block diagram showing a configuration of a speech speed conversion unit.

FIG. 3 is a configuration diagram showing a schematic configuration of another video / audio reproduction device.

[Explanation of symbols]

 2 video / caption reproduction device 3 section determination unit 4 voice speed conversion unit 30 caption information extraction unit 41 audio signal input unit 42 signal processing unit 43 audio memory 45 audio signal output unit 51 time base compression / expansion unit 52 deletion unit

Claims (2)

[Claims] 1. A video / audio reproducing apparatus for reproducing software including a video signal and an audio signal and having caption information inserted in the video signal, means for extracting caption information from an input video signal from the software, And when the subtitle information is not extracted, the input audio signal from the software is output without converting the speech speed,
An audio / video reproducing apparatus comprising: audio output means for converting a voice speed of an input audio signal from software so as to reduce a voice speed and outputting when the subtitle information is extracted. 2. A video / audio reproducing apparatus for reproducing software including a video signal and an audio signal and having caption information inserted in the video signal, an input means for inputting a keyword, and an input video from the software. Extraction means for extracting caption information from the signal, determination means for determining whether the input keyword matches the caption information extracted by the extraction means, ordinarily, converting the speech speed of the audio signal input from the software When the determination unit determines that the keyword matches the subtitle information, the voice output unit outputs the input voice signal from the software by converting the voice speed so that the voice speed becomes slow for a certain period of time. A video / audio reproducing device characterized by comprising means.