JP2001298710A - Video processing unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a video processing unit that can reproduce an audio signal at a normal speed while displaying a video image that is fast-forwarded. SOLUTION: A reproduction speed control section 101 instructs a reproduction speed of an audio signal and a reproduction speed of a video signal. A video signal control section 102 generates a video image in response to the reproduction speed on the basis of the video signal read from an audio/video signal recording section 104 and an audio signal control section 103 generates an audio signal in response to the reproduction speed on the basis of the audio signal read from the audio/video signal recording section 104. After an audio/ video signal output time adjustment section 105 corrects the sound quality of the generated audio signal, the audio signal is outputted together with the video signal while adjusting output timing of the audio signal with respect to the video signal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video processing device for individually and variably controlling a video signal and a sound signal.

[0002]

2. Description of the Related Art As recording apparatuses for recording video (moving images) and sounds as digital signals, digital recording VTRs and non-linear editing machines are known. In any of these devices, when playing at a higher speed than at the time of recording, the sound information is also deleted by the video thinning process, so the information provided by audio, for example, for those who hear discontinuous messages, It was common to be hard to hear.

On the other hand, in a recording apparatus such as a VTR for recording with an analog signal, a processing method for adding a sound that is easy to hear in accordance with the reproduction speed of a moving image has been proposed (Japanese Patent Application No. 9-249220).

[0004]

As described above, it has become possible to add a sound that is easy to hear in synchronization with the reproduction speed of a moving image. However, when the video is played back at high speed, the sound is also played back at high speed, so that the sound becomes fast and the sound is hard for the listener to hear.

It is therefore an object of the present invention to provide a video processing apparatus which reproduces and outputs recorded video and audio at different reproduction speeds and does not impair the sound quality of the audio output.

[0006]

In order to achieve the above object, according to the present invention, there is provided an input means for inputting a video signal and a sound signal sampled at the same speed as the video signal; Playback speed instructing means for instructing a first playback speed of a signal and a second playback speed of the sound signal; and a video signal input from the input means in response to the designated first playback speed. Video control means for creating a sound signal corresponding to the instructed second reproduction speed based on the sound signal input from the input means; and Sound / video output timing adjusting means for adjusting the output timing of the corrected sound signal and the video signal created by the video control means after performing the sound quality correction, and outputting the adjusted video signal. That.

According to a second aspect of the present invention, in the video processing apparatus according to the first aspect, the first reproduction speed and the second reproduction speed are different.

According to a third aspect of the present invention, in the video processing apparatus according to the first aspect, the input means is a recording device that records a sound signal and a video signal, and reads out the sound signal and the video signal from the recording device. In this case, the input is performed by the user.

According to a fourth aspect of the present invention, in the video processing apparatus according to the first aspect, the input means is a receiving means for receiving a sound signal and a video signal from outside.

According to a fifth aspect of the present invention, in the video processing apparatus of the first aspect, the input means inputs a compressed audio signal and a video signal, and decompresses the compressed audio signal and the video signal. It is characterized by further comprising means.

According to a sixth aspect of the present invention, in the video processing apparatus according to the first aspect, the reproduction speed instruction means variably instructs the first reproduction speed and the second reproduction speed at a predetermined timing. It is characterized by.

[0012]

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

(First Embodiment) FIG. 1 shows a system configuration of an embodiment of the present invention.

In FIG. 1, reference numeral 101 denotes a reproduction speed control unit which instructs a video signal control unit 102 on a video reproduction speed and instructs a sound signal control unit 103 on a sound reproduction speed.

Reference numeral 102 denotes a video signal control unit which reads out only a video signal from the audio / video signal recording unit 104 and creates a video according to the reproduction speed specified by the reproduction speed control unit 101. More specifically, thinning-out (high-speed reproduction) and insertion (low-speed reproduction) of a video signal in frame units are performed.

Reference numeral 103 denotes a sound signal control unit which reads out only a sound signal from the sound / video signal recording unit 104 and creates a sound signal corresponding to the sound reproduction speed specified by the reproduction speed control unit 101. More specifically, the audio / video signal recording unit 10
Then, the fundamental frequency of the sound read out from step 4 is extracted, and a waveform is inserted into the sound signal in this unit, or the sound signal is thinned out. Japanese Patent Application 2000-30 for thinning out sound signals
959 may be used.

A sound / video signal recording unit 104 records (stores) a sound signal and a video signal input from a television camera, a video camera, or another information processing device.

Reference numeral 105 denotes a sound / video signal output time (timing) adjustment unit, for example, Japanese Patent Application No. 2000-3095.
Based on the sound signal processing method proposed in No. 9, sound that does not deteriorate in sound quality is added to the sound signal, or a signal correction process suitable for early listening is performed on the sound signal. After this, the sound
The video signal output time (timing) adjustment section 105 adjusts the output time and output timing of the video signal output from the video signal control section 102 and the signal-corrected sound signal, and outputs them externally.

In the above system, for example, the video signal indicates a high reproduction speed by the reproduction speed control unit 101,
The audio signal indicates a slow playback speed, and the video signal and the audio signal output from the audio / video signal output time adjustment unit 105 are reproduced and output by a television receiver or the like. Is reproduced and output slowly. Even if the reproduction speed becomes slow, the sound quality is corrected in the sound / video signal time adjustment unit 105, so that the listener does not feel uncomfortable.

(Second Embodiment) A second embodiment for compressing video signals and audio signals recorded (stored) in the audio / video signal recording section will be described below.

FIG. 2 shows a system configuration of the second embodiment. In FIG. 2, the same parts as those in the first embodiment of FIG. 1 are denoted by the same reference numerals, and detailed description thereof will be omitted.

In FIG. 2, there is provided a compressed signal decompression unit 100 for reading out a compressed video signal and a compressed audio signal from the audio / video signal recording unit 104 and decompressing them. The decompressed video signal is output to the video signal control unit 102, and the decompressed audio signal is output to the audio signal control unit 103.

In this embodiment, since the audio signal and the video signal are compressed, the audio / video signal recording unit 104 can store a large amount of the video signal and the audio signal.

(Third Embodiment) FIG. 3 shows a third embodiment in which a compressed video signal and audio signal are input from the outside. In FIG. 3, the same parts as those in the second embodiment in FIG. 2 are denoted by the same reference numerals, and detailed description thereof will be omitted.

In FIG. 3, reference numeral 114 denotes a sound / video signal data receiving unit, which receives a compressed sound signal and video signal from the Internet or an intranet. The received audio signal and video signal are decompressed in the compressed signal decompression unit 100.

In the embodiment described above, the reproduction speed control unit 101, the video signal control unit 102, the sound signal control unit 10
3. The audio / video signal output time adjustment unit 105 and the compressed signal decompression unit 100 can be realized by a CPU that executes a program that defines the functions of the above components and a memory that stores related data.

The audio / video signal recording unit 104 can use a hard disk or a memory. The sound / video data receiving unit 114 can use a known communication circuit such as a modem or a LAN card.

In FIG. 2, the video signal from the audio signal recording unit 104 is provided by an external instruction so that both the compressed audio signal and video signal and the uncompressed audio signal and video signal can be handled. Alternatively, a signal path for switching and outputting to the compressed signal decompression unit 100 and the video signal control unit 102 may be provided. The audio signal is switched from the audio / video signal recording unit 104 to the video signal control unit 103 and the compressed signal decompression unit 100 and output.

Further, instead of the audio / video signal recording unit 104 of the first embodiment, an uncompressed audio signal and video signal may be input from an external device or a communication network via a data receiving unit.

Further, in the above-described embodiment, the playback speed control unit 101 instructs the playback speed of the audio signal and the video signal. The playback speed may be instructed.

The reproduction speeds of the audio signal and the video signal may be the same or different. Further, the reproduction speed of the audio signal and the video signal does not always need to be constant, and the reproduction speed control unit 101 controls the reproduction speed of the audio signal and / or the reproduction speed of the video signal at a predetermined timing. Of course, it is also possible to set variably.

[0032]

As described above, according to the present invention,
It is not necessary to reproduce the sound signal at the same reproduction speed as the video reproduction speed as in the related art. A new service can be provided by reproducing and outputting at a reproduction speed of each of the audio signal and the video signal. For example, playing the image at normal speed for the elderly and playing the sound at a low speed can provide the elderly with images and sounds that are easy to hear. In addition, by increasing or decreasing the speed of the sound signal for practicing English conversation, learning efficiency can be increased. In this case, the learning efficiency can be further increased by associating with the video instead of simply learning only the sound. For example, if you play a foreign movie,
If the speed of the human voice of the video is variably set, the efficiency of learning English will be significantly improved.

The audio signal and the video signal to be processed may be input from a recording medium such as a hard disk or a CDROM, or may be input from the Internet, a LAN (intranet), or another computer. For example, the client may receive an Internet TV broadcast provided by a server connected to the Internet and perform the video processing of the present invention.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a system configuration according to a first embodiment of the present invention.

FIG. 2 is a block diagram illustrating a system configuration according to a second embodiment of the present invention.

FIG. 3 is a block diagram illustrating a system configuration according to a third embodiment of the present invention.

[Explanation of symbols]

 101 playback speed control unit 102 video signal control unit 103 sound signal control unit 104 sound / video signal recording unit 105 sound / video signal output time adjustment unit

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Tohru Toki 1-10-11 Kinuta, Setagaya-ku, Tokyo Inside Japan Broadcasting Corporation Broadcasting Research Institute (72) Inventor Tsuyoshi Mishima 1-1-10 Kinuta, Setagaya-ku, Tokyo No. 11 Japan Broadcasting Corporation F-Term (Broadcasting Research Laboratory) 5C018 AB13 JA02 5C053 FA23 HA03 HA24 HA27 JA12 LA14 5D044 AB05 AB07 BC01 CC03 FG10 FG21 FG24 GK03 5D080 AA05 BA01 DA04 FA39 GA02 GA12 GA16

Claims (6)

[Claims] An input means for inputting a video signal and a sound signal sampled at the same speed as the video signal; a first reproduction speed of the video signal and a second reproduction speed of the sound signal;
Playback speed instructing means for instructing the playback speed of the video signal; video control means for creating a video signal corresponding to the instructed first playback speed based on the video signal input from the input means; Sound control means for generating a sound signal corresponding to the reproduction speed of the sound signal based on the sound signal input from the input means, and after correcting the sound quality of the generated sound signal, And a sound / video output timing adjusting means for adjusting the output timing of the video signal generated by the video control means and outputting the adjusted video signal. 2. The video processing device according to claim 1, wherein the first playback speed and the second playback speed are different. 3. The video processing device according to claim 1, wherein said input means is a recording device that records a sound signal and a video signal, and performs input by reading out the sound signal and the video signal from the recording device. A video processing device characterized by the above-mentioned. 4. The video processing apparatus according to claim 1, wherein said input means is a receiving means for receiving a sound signal and a video signal from outside. 5. The video processing apparatus according to claim 1, wherein said input means further comprises a decompression means for inputting a compressed audio signal and a video signal, and decompressing said compressed audio signal and said video signal. A video processing device characterized by the above-mentioned. 6. The video processing apparatus according to claim 1, wherein said reproduction speed instruction means variably instructs said first reproduction speed and said second reproduction speed at a predetermined timing. Processing equipment.