JPH11134815A - Recording medium, reproducing device, and recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable reproduction of character information corresponding to voice recognition data at the same time in reproducing video information by recording the video information and the voice recognition data into a recording medium and expressing the contents of the video information as characters at the time of reproduction. SOLUTION: A recording and reproducing device performs predetermined processing on video data picked up by a camera 1 and voice data picked up by a microphone 3, and records the video and voice data into a magneto-optical disk 8. In this case, text data generated by a voice recognition circuit 4 for recognizing voice data and a text conversion circuit 5 for converting the recognized voice data to text is recorded together into the magneto-optical disk 8. In reproducing the video data and the voice data, the text data which is recorded together with these data is reproduced and character information is displayed on a display. On the display, the character information overlapping the image may be displayed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus for recording / reproducing video and audio, and more particularly to a recording / reproducing apparatus for recording and reproducing video and audio on a random access type recording medium. .

[0002]

2. Description of the Related Art Currently, as a device for recording / reproducing video and audio, a VTR (Video Tape R) using a magnetic tape is used.
ecorder) is widespread. When video and audio are reproduced using this VTR, the magnetic tape is rewinded to a reproduction position and reproduced by pressing a reproduction button.

[0003]

However, the above-mentioned VT
In R, if the user is a deaf person,
If the voice could not be heard, the content of the video could not be understood.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a method for reproducing character information corresponding to voice recognition data when reproducing video information. Is to provide a recording medium that can be reproduced together.

[0005] The object of the invention described in claims 6 and 7 is as follows.
An object of the present invention is to provide a reproducing apparatus capable of displaying the contents of a recorded video as characters.

An object of the present invention is to provide a recording / reproducing apparatus capable of recording / reproducing the contents of a video as characters.

[0007]

According to a first aspect of the present invention, there is provided a recording medium on which video information and audio recognition data are recorded.

[0008] Since the video information and the voice recognition data are recorded on the recording medium, the contents of the video information can be represented as characters during reproduction.

According to a second aspect of the present invention, there is provided the recording medium according to the first aspect, wherein the video information is compressed video data, and the compressed video data and the audio recognition data are time-division multiplexed to record one channel. It is characterized by having been done.

[0010] Since the compressed video data and the audio recognition data are recorded in a time-division multiplexed manner, they can be reproduced in synchronization with each other during reproduction.

[0011] A recording medium according to a third aspect is the recording medium according to the second aspect, wherein the recording medium is a disk.

[0012] Since the recording medium is a disk, random access is possible, and free space can be used effectively.

According to a fourth aspect of the present invention, there is provided the recording medium according to the third aspect, wherein a recording track of the disk is constituted by recording blocks of a predetermined size.

Since the recording track of the disc is composed of recording blocks of a predetermined size, it is possible to increase the access speed at the time of random access.

A recording medium according to a fifth aspect is the recording medium according to the third or fourth aspect, wherein the disk is a magneto-optical recording medium.

Since the disk is a magneto-optical recording medium, it is possible to record long-term video information and voice recognition data.

According to a sixth aspect of the present invention, there is provided a reproducing apparatus for reproducing a recording medium on which video information and voice recognition data are recorded, and generating character information corresponding to the reproduced voice recognition data. A multiplexing unit for multiplexing video information and a display unit for displaying an output of the multiplexing unit are provided.

The display means multiplexes and displays the reproduced video information and the character information, so that the user can see the video information and the character information in association with each other.

According to a seventh aspect of the present invention, there is provided a reproducing apparatus for reproducing a recording medium on which video information and audio recognition data are recorded, and generating audio information corresponding to the reproduced audio recognition data. Display means for displaying video information and audio information are provided respectively.

Since the audio information generating means generates audio information corresponding to the reproduced audio recognition data, it is possible to display the reproduced video information and the audio information in association with each other.

[0021] The recording / reproducing apparatus according to the eighth aspect of the present invention converts video input means for inputting video, audio input means for inputting audio, and audio input by the audio input means into text data. Recording means for recording, on a recording medium, video data input by the video input means, audio data input by the audio input means, and text data recognized by the voice recognition means. A recording / reproducing apparatus including reproducing means for reproducing video data, audio data, and text data recorded on a medium.

When the reproducing means reproduces the video data and the audio data recorded on the recording medium, the reproducing means also reproduces the text data, so that the user can easily grasp the contents of the video by the reproduced text. It becomes possible.

According to a ninth aspect of the present invention, there is provided the recording / reproducing apparatus according to the eighth aspect, wherein the recording / reproducing apparatus further includes an output unit for outputting the text data overlapping with the video data.

Since the output means outputs the text data overlapping the video data, the user can see the video and the character information in association with each other.

A recording and reproducing apparatus according to a tenth aspect is the recording and reproducing apparatus according to the eighth or ninth aspect, wherein the recording medium is a magneto-optical recording medium.

Since the recording medium is a magneto-optical recording medium, it is possible to record / reproduce long-term video data, audio data and text data added thereto.

[0027]

Embodiment 1 FIG. 1 is a block diagram showing a schematic configuration of a recording / reproducing apparatus according to Embodiment 1 of the present invention. This recording / reproducing apparatus includes an MPEG (Moving Picture Experer) for encoding video data taken by the camera 1.
ts Group) An encoder 2, a voice recognition circuit 4 for recognizing voice data picked up by the microphone 3, and a text conversion circuit 5 for converting voice data to text data based on a recognition result by the voice recognition circuit 4. And MP
A multiplexer 6 for synthesizing the video data encoded by the EG encoder 2, the audio data obtained by the microphone 3, and the text data converted by the text conversion circuit 5, and modulates the data output from the multiplexer 6. A magnetic head 9 for recording data by a magnetic field together with a pickup 10 when writing data, and irradiating a magneto-optical disk 8 with laser light having a wavelength of 635 nm at a predetermined timing. A pickup 10 for reading information of a wobble signal based on data magnetically recorded on the magneto-optical disk 8, a synchronizing signal, and a physically recorded wobble; a spindle motor 11 for rotating the magneto-optical disk 8; , Such as data read by the pickup 10 Head amplifier 1 for performing the amplification
2, a decoder 13 for demodulating and outputting data read by the pickup 10, and a demultiplexer 14 for separating and outputting data from the decoder 13 into text data, audio data, and video data.
A text data generating circuit 15 for generating character information based on the text data output from the demultiplexer 14, and a display for displaying the characters output from the text data generating circuit 15 on a display such as a television screen A controller 16, an audio demodulation circuit 17 for demodulating and outputting audio data output from the demultiplexer 14, a speaker 18 for outputting audio, and demodulating video from video data output from the demultiplexer 14. And an MPEG video decoding circuit 20 for decoding the demodulated encoded data.

When recording video data, audio data and text data on the magneto-optical disk 8, the video data encoded by the MPEG encoder 2, the audio data taken by the microphone 3, and the text The audio data converted into the data is input. The multiplexer 6 sequentially switches between encoded video data, audio data, and text data and outputs the data to the encoder 7. The encoder 7 modulates the data output from the multiplexer 6 and outputs the data to the magnetic head 9 and the pickup 10. Magnetic head 9
The pickup 10 is moved to a track for recording data, and records data output from the encoder 7 on the magneto-optical disk 8 sequentially.

Further, video data from the magneto-optical disk 8,
When reproducing the audio data and the text data, after the tracking of the pickup 10 is performed, the data read by the pickup 10 is demodulated by the decoder 13. The demultiplexer 14 separates the data demodulated by the decoder 13 into video data, audio data, and text data and outputs the data. The text data generating circuit 15 generates and outputs character information from the text data separated by the demultiplexer 14, and the display controller 16 displays the character information on a display such as a television screen. The audio data separated by the demultiplexer 14 is demodulated by an audio demodulation circuit 17 and output from a speaker 18 as audio. Further, the video data output from the demultiplexer 14 is demodulated by the video demodulation circuit 19,
After being decoded by the G video decoding circuit 20, it is displayed on the display.

The speech recognition circuit 4 holds, for example, the speech spectrum of a specific phrase as a knowledge base, and recognizes the speech by performing matching with the spectrum of the speech taken by the microphone 3. In addition, since this technique is publicly known, detailed description is omitted.

As described above, when the video data and the audio data are recorded on the magneto-optical disk 8, the text data generated from the audio data is recorded on the magneto-optical disk 8 together. Then, when the video data and the audio data are reproduced, the text data recorded together is reproduced to display the character information on the display. The display on the display may be such that character information is overlapped with the video. Note that a method of displaying character information in an overlapped manner on a video is known, and a detailed description thereof will be omitted.

FIG. 2 and FIG. 3 are diagrams for explaining the file structure of the magneto-optical disk in the present embodiment. As shown in FIG. 2, a directory area is provided in the first recording area of the magneto-optical disk 8, and the directory area has a file name of each file,
Usage status, creation date and time, file capacity, FAT (File Allocation Table) number of the first data, and the like are recorded. A FAT area is provided next to the directory area, and information on which area in the data area each file is recorded is recorded. A data area is provided next to the FAT area, and a total of n 2 kB areas (sectors) are provided. One track is composed of a plurality of sectors.

As shown in FIG. 3, when video 1 is recorded, a directory related to video 1 is recorded in the first area of the directory area. Video 1 "F of the first data
By referring to the "AT number", it can be understood that information of 2 kB of the first video data is recorded in the data area corresponding to the FAT number "1". It can be seen that the subsequent 2 kB information is recorded in the data area corresponding to the FAT number “2.” As described above, by sequentially referring to the contents of the FAT area, the information of 7 kB can be obtained. It can be seen that the data is recorded in four data areas.

FIG. 4 is a diagram showing a data structure when the recording / reproducing apparatus according to the present embodiment records video data, audio data, and text data. For example, video data is recorded for 5 sectors, and then audio data is recorded for 1 sector.
Record for the sector. By repeating this recording, area 6
Video data and audio data for 0 sectors are recorded.
Then, the text data generated by the speech recognition circuit 4 is recorded in one sector following the area 1.

An instruction signal area is provided before the area 1, and this instruction signal area is recorded in a predetermined sector. In the instruction signal area, a recording sector start position of video data, a recording sector start position of audio data,
Information about text data (information such as the recording sector start position and the number of sectors to be recorded), the ratio of video data and audio data, the compression ratio of video data and audio data, and the like are recorded.

The demultiplexer 14 refers to the contents of the instruction signal area, outputs the extracted video data to the video demodulation circuit 19, and outputs the extracted audio data to the audio demodulation circuit 1.
7, and outputs the extracted text data to the text data generation circuit 15. As described above, by reproducing the video data, the audio data, and the text data, it is possible to synchronously reproduce the respective data.

[Second Embodiment] FIG. 5 is a block diagram schematically showing a reproducing apparatus according to a second embodiment of the present invention. This reproducing apparatus is obtained by deleting the recording system circuit of the recording and reproducing apparatus according to the first embodiment shown in FIG. Therefore, detailed description of the same configurations and functions will not be repeated. As described above, the reproducing apparatus according to the present embodiment, which is a reproduction-only apparatus, reproduces the text data recorded together when reproducing the video data and the audio data recorded on the magneto-optical disk 8. Displays character information on the display.

Although the embodiment of the present invention has been described above, the video information recorded on the recording medium may be analog information. Also, when recording video data, audio data and text data, only one-channel recording has been described, but multiple channels may be recorded simultaneously.
Furthermore, although a magneto-optical disk has been described as an example of a recording medium, a magnetic tape or the like may be used.

[0039]

According to the recording medium of the first aspect, video information and audio recognition data can be reproduced simultaneously.

According to the recording medium of the second aspect, since the compressed video data and the audio recognition data are time-division multiplexed and recorded on one channel, it is possible to reproduce in a synchronized manner.

According to the recording medium of the third aspect, since the recording medium is a disk, random access is possible, and the free space can be effectively used.

According to the recording medium of the fourth aspect, since the recording track is composed of recording blocks of a predetermined size, it is possible to increase the access speed at the time of random access.

According to the recording medium of the fifth aspect, since the disk is a magneto-optical recording medium, it is possible to record long-time video information and voice recognition data.

According to the reproducing apparatus of the sixth aspect, since the video information and the character information are multiplexed and displayed, the user can see the video information and the character information in association with each other.

According to the reproducing apparatus of the present invention, since the video information and the voice information corresponding to the voice recognition data are displayed, the user can view the video information and the voice information in association with each other. Was.

According to the recording / reproducing apparatus of claim 8,
When reproducing the video data and the audio data, the text data generated from the audio data is also reproduced at the same time, so that the contents of the video can be easily grasped by the character information.

According to the recording / reproducing apparatus of the ninth aspect,
In addition to the effect described in claim 8, it has become possible to more easily grasp the contents of the video.

According to the recording / reproducing apparatus of the tenth aspect, since the recording medium is a magneto-optical recording medium, the recording / reproducing apparatus can record / reproduce long-term video data, audio data, and text data added thereto. It became.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a schematic configuration of a recording / reproducing apparatus according to Embodiment 1 of the present invention.

FIG. 2 is a diagram (part 1) for explaining a file structure of the magneto-optical disk according to the first embodiment of the present invention;

FIG. 3 is a diagram (part 2) for explaining the file structure of the magneto-optical disk according to the first embodiment of the present invention;

FIG. 4 is a diagram for explaining recording positions of video data, audio data, and text data.

FIG. 5 is a block diagram showing a schematic configuration of a playback device according to Embodiment 2 of the present invention.

[Explanation of symbols]

 Reference Signs List 1 camera 2 MPEG encoder 3 microphone 4 voice recognition circuit 5 text conversion circuit 6 multiplexer 7 encoder 8 magneto-optical disk 9 magnetic head 10 pickup 11 spindle motor 12 head amplifier 13 decoder 14 demultiplexer 15 text data generation circuit 16 display controller 17 voice demodulation Circuit 18 Speaker 19 Video demodulation circuit 20 MPEG video decoding circuit

──────────────────────────────────────────────────の Continued on front page (51) Int.Cl. ⁶ Identification code FI H04N 5/92

Claims (10)

[Claims] 1. A recording medium on which video information and audio recognition data are recorded. 2. The video information is compressed video data,
2. The recording medium according to claim 1, wherein said compressed video data and audio recognition data are time-division multiplexed and recorded on one channel. 3. The recording medium according to claim 2, wherein said recording medium is a disk. 4. The recording medium according to claim 3, wherein the recording track of the disc is composed of recording blocks of a predetermined size. 5. The recording medium according to claim 3, wherein the disk is a magneto-optical recording medium. 6. A character information generating means for reproducing a recording medium on which video information and audio recognition data are recorded and generating character information corresponding to the reproduced audio recognition data, and a multiplexing means for multiplexing the reproduced video information. And a display device for displaying an output of the multiplexing device. 7. An audio information generating means for reproducing a recording medium on which video information and audio recognition data are recorded and generating audio information corresponding to the reproduced audio recognition data; A playback device including a display unit for displaying. 8. A video input unit for inputting a video, a voice input unit for inputting a voice, a voice recognition unit for converting a voice input by the voice input unit into text data, Recording means for recording, on a recording medium, video data input by the video input means, audio data input by the audio input means, and text data recognized by the audio recognition means, A recording / reproducing apparatus including a reproducing unit for reproducing recorded video data, audio data, and text data. 9. The recording / reproducing apparatus according to claim 8, wherein said recording / reproducing apparatus further includes an output unit for outputting said text data overlapping with said video data. 10. The recording / reproducing apparatus according to claim 8, wherein the recording medium is a magneto-optical recording medium.