JP2000333133A - Video processor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a video processor in common use for digital and analog video signal that can effectively realize a noise elimination function at slow reproduction of the analog video signal by using components of a digital video processing system. SOLUTION: A shuffling memory 112 is used not only for recording and reproduction of digital moving picture data but also for recording and reproduction of digital still picture data and for slow reproduction of analog video data. The shuffling memory 112 is in operation in either selected from two modes; a video block video recording mode where data are supplied to a reproduction system and a video block reproduction mode where data are supplied to a reproduction system. In the analog slow reproduction mode, when the video processing unit receives analog reproduced data without noise, the shuffling memory 112 stores the data, and when the video processing unit receives analog reproduced data including noise, the analog reproduced data without noise that have been stored in the shuffling memory 112 are outputted for the slow reproduction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video processing apparatus for performing analog video reproduction and digital video recording / reproduction using a video tape.

[0002]

2. Description of the Related Art Conventionally, in a VTR using an analog video tape, as a method of removing noise during slow playback, for example, as disclosed in Japanese Patent Application Laid-Open No. 62-92686, a video using a rotating head drum is disclosed. In the slow playback operation of the tape, the playback data when the video tape is not driven is fetched into the memory and is used as the playback data. There is known one that removes noise.

On the other hand, in a video recording / reproducing apparatus using this kind of video tape, digitization of the system is progressing, and it is expected that the digitized video recording / reproducing apparatus will become mainstream in the near future. In such a digitized video recording / reproducing apparatus, a function for reproducing a conventional analog-recorded video tape is provided to enable normal reproduction or slow reproduction of analog video (for example, D8 by the present applicant). Method) has been proposed.

[0004]

However, when the digital video recording / reproducing apparatus is provided with the analog reproducing function as described above, the digital video data recording / reproducing system and the analog video data reproducing system are completely separated. In such a case, there is a problem that the number of overlapping functional elements increases, which leads to an increase in the number of components and an increase in the size of the apparatus.

SUMMARY OF THE INVENTION An object of the present invention is to provide a digital / analog common video processing apparatus capable of effectively realizing a noise removal function at the time of slow reproduction of analog video using elements of a digital video processing system. It is in.

[0006]

In order to achieve the above object, the present invention provides a recording and reproducing mechanism for performing analog video reproduction and digital video recording and reproduction using a video tape, and a digital video data using the video tape. A video processing device having a digital video processing unit for performing recording and reproduction processing, and an analog video processing unit for performing reproduction processing of analog video data using the video tape, wherein the digital video processing unit includes the digital video data. At the time of recording, a shuffling memory for performing a shuffling process of digital video data, and at the time of slow reproduction of the analog video data, the analog video reproduction data containing no noise is The shuffling memory is selectively loaded into the shuffling memory. And having a memory control means for performing no slow playback noise using data taken in.

In the video processing apparatus of the present invention, when recording digital video data, the digital video processing unit is set to the digital video data recording mode, and after the input digital video data is stored in the shuffling memory, the recording is performed. Transmitted to the system. Further, at the time of slow playback of analog video data, the digital video processing unit is set to a slow playback mode of analog video data, and the input analog video data is stored in the shuffling memory at a timing including no noise. ,
It is transmitted to the reproduction system at a predetermined timing. Therefore,
Noise removal in the slow reproduction of analog video data can be performed using a shuffling memory for digital video data shuffling processing in the digital video processing unit, and circuit elements can be reduced as compared with a case where a separate memory is provided. Can be achieved.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a video processing device according to the present invention will be described below. FIG. 1 is a block diagram showing an outline of a system in a video processing device according to the present invention. FIG. 2 is a block diagram showing a configuration of a data processing unit of the video processing apparatus shown in FIG.
FIG. 3 is a block diagram illustrating a configuration of a digital video processing unit of the data processing unit illustrated in FIG. 2. 1 to 3 described above.
FIG. 1 mainly shows only elements for describing functions of the present invention.

The video processing apparatus according to the present embodiment comprises a recording / reproducing mechanism unit 10 of a rotating head drum type for performing analog video reproduction and digital video recording / reproduction using an 8 mm video tape cassette, and a digital image pickup device such as a CCD. A video camera unit 20 for capturing video data, and an LC for reproducing and outputting analog and digital moving images and still images
D display unit 30 and data processing unit 4 for performing various data processing
0, an operation unit 50 for performing various operations, and a power supply unit 60 for supplying power to the entire apparatus. The video processing device of this example is configured as a portable camcorder, and digitally records digital data captured by the video camera unit 20 on a digital video tape, and reproduces digital video data recorded on the digital video tape. For example, processing such as displaying on the LCD display unit 30 or reproducing analog video data recorded on an analog video tape and displaying it on the LCD display unit 30 can be performed.

In recording and reproducing digital video data, the digital video data is divided into fixed block units, and each block is recorded in a state of being cut and mixed on a video tape in accordance with a fixed rule. A shuffling process for reproducing and combining the recorded blocks is performed. Furthermore, when recording digital video data,
The data is compressed according to a predetermined compression method and transmitted to the recording system, and when digital data is reproduced, the compressed data is decompressed and output to the reproduction system. In addition, at the time of normal analog video data reproduction, analog video data reproduced from an analog video tape based on a horizontal / vertical synchronization signal or the like is sequentially sent to a reproduction system to perform a reproduction operation.

In FIG. 2 and FIG. 3, an analog video processing section 100 processes an analog reproduction signal reproduced from a video tape. The analog video data output from the analog video processing section 100 is a digital video signal. The digital video signal is temporarily input to the processing unit 110, and is transmitted from the digital video processing unit 110 to a reproduction system. The digital video processing unit 110 has a video input terminal (LINE I
N) has a function of transmitting various types of video data input from N) to a reproduction system or a recording system, and has a shuffling memory 112 for performing the above-described shuffling processing of digital video data. The shuffling memory 112 has an area for one frame as an area for storing video data, a mode in which the video data stored in this area is always rewritten by input data,
A mode in which once stored video data is not rewritten for a certain period.

In the video processing apparatus of this embodiment, the shuffling memory 112 is used not only for recording and reproducing digital moving image data, but also for recording and reproducing digital still image data and for slow reproduction of analog video described later. It is. As described above, the analog video data is input to the digital video processing unit 110 from the analog video processing unit 100. A horizontal / vertical synchronization signal (H / V) and an analog A signal (O / E) indicating an odd / even number in a field of video data is input from the analog video processing unit 100.

In the digital video processing section 110, during normal analog reproduction, a field counter 114 and a video counter based on the horizontal / vertical synchronization signals (H / V) and the odd / even signals (O / E) as described above. The output frame counter 116 is operated, and the video input terminal (LINE
IN) is connected to a video output terminal (VIDEO OUT), and an operation of sending the signal to a reproduction system is performed. The microcomputer 12
Numeral 0 controls the entire video processing apparatus of the present embodiment, and controls the switching of the processing mode and the internal operation in the digital video processing unit 110 based on the input from the operation unit.

Next, the function of the video processing apparatus having the above-described configuration at the time of analog slow reproduction will be described. FIG. 4 is a diagram for explaining the principle of generating noise in a reproduction signal during analog slow reproduction. When reproducing the frames A, B, and C recorded on the video tape, the video head controls the fields Ae,
It moves in the direction of the arrow along each track on which Ao, Be, Bo, Ce, and Co are recorded, and takes in the signal on the tape. However, for example, when moving from the A frame to the reproduction of the B frame, the head moves due to the intermittent operation, and passes through the path indicated by oblique line A 'to each track in the reverse of the recording direction.

Therefore, due to this scanning, as shown in FIG. 5, a reproduced signal on which noise is present is input to the video input terminal of the digital video processing unit 110 described above. If this is output from the output terminal as it is to the playback system, the slow playback video displayed on the LCD display unit 30 will be a video containing noise. Therefore, in order to remove the noise at the time of the slow reproduction, the video output may be made using only the noise-free Ae / Ao, Be / Bo, and Ce / Co data shown in FIG. Therefore, Ae / A
o, Be / Bo, and Ce / Co are sequentially stored in the shuffling memory 112, and the data stored in the memory 112 is supplied to the video output terminal until the next data containing no noise comes. When the next data containing no noise comes, this data is newly stored in the shuffling memory 112 and the same operation is repeated.

The shuffling memory 112 is configured to operate by switching between a video block recording mode in which data flows to a recording system and a video block reproduction mode in which data flows to a reproduction system. Is set to the video block recording mode when the data is taken in, and the video block reproduction mode is set when the data from the recording system is output to the video output terminal. Therefore, Ae / Ao without noise,
When storing each data of Be / Bo and Ce / Co in the shuffling memory 112,
Is set to the video block recording mode, and Ae / Ao, Be / Bo, Ce /
When outputting Co data to the video output terminal, the shuffling memory 112 is set to the video block reproduction mode.

FIG. 6 is an explanatory diagram showing the flow of analog reproduction data of the digital video processing section 110 during slow reproduction. For example, at the timing when Ae / Ao data is input to the video input terminal, the Ae / Ao data is output to the video output terminal as it is,
The shuffling memory 112 is set to the video block recording mode, and Ae / Ao data is stored in the shuffling memory 1.
Take in to 12. Then, at the timing of the next frame (A '/ A'), the shuffling memory 112 is set to the video block playback mode and the shuffling memory 112 is set.
, The A ′ / A ′ data input from the video input terminal is canceled, and the Ae / Ao data is output from the shuffling memory 112 to the video output terminal.

After such an operation is repeated for a plurality of frames, the Be / Bo data is output to the video output terminal as it is at the timing when Be / Bo data is input to the video input terminal, and the shuffling is performed. Set the ring memory 112 to the video block recording mode,
The data of e / Bo is taken into the shuffling memory 112. Then, at the timing of the next frame (B '/ B'), the shuffling memory 112 is set to the video block reproduction mode to prohibit the data capture in the shuffling memory 112, and the B '/ B' input from the video input terminal. The data of B ′ is canceled, and the data of Be / Bo is output from the shuffling memory 112 to the video output terminal.

In this way, noise-free Ae / A
By transmitting only o, Be / Bo, and Ce / Co to the playback system as a playback signal, a slow playback video without noise is obtained. Further, in order to obtain the above operation, it is necessary to use Ae / Ao, Be / Bo, Ce / C without noise.
The timing of inputting each data of o and the timing of inputting each data of A '/ A', B '/ B', and C '/ C' including noise are detected in real time, and the mode of the shuffling memory 112 is detected. It is necessary to control the switching between the data capture and output operations.

In FIG. 2, a signal for frame reference input to the microcomputer 120 is transmitted to the shuffling memory 1.
12, a state signal (CAPON) indicating rotation and stop of the capstan in the recording / reproducing mechanism unit 10 is used as the reference signal in this example. In other words, when the capstan is not operating, the video tape is not moving,
The analog video data read at this timing can be determined to be noise-free, the video tape is moving while the capstan is operating, and the analog video data read at this timing is determined to contain noise. it can.

FIG. 7 is an explanatory diagram showing the relationship between the above-described analog reproduction data and the status signal (CAPON). As shown in the figure, at the timing when the state signal (CAPON) rises, noise-free Ae / Ao, Be / Bo,
The input timing of Ce / Co can be obtained. FIG.
Is a flowchart showing a control operation when switching the mode of the shuffling memory 112 and the operation of taking in and outputting data with reference to the state signal (CAPON). For example, the flowchart of FIG. 8 is started at the beginning of each frame by the vertical synchronization signal V, and CAPON is referred to (S1). If the CAPON has been activated (S1; Y), the shuffling memory 112 is set to the video block recording mode (S2), and the data acquisition into the shuffling memory 112 is started (S1).
3). If CAPON is falling (S4; Y), the shuffling memory 112 is set to the video block reproduction mode (S5), and the data is not taken into the shuffling memory 112 (S6). Such an operation is started, for example, in response to the vertical synchronization signal V,
The mode of the shuffling memory 112 is switched, and the analog video data at the time of slow reproduction is switched.

The above operation is performed based on a slow reproduction selection operation from the operation unit. The digital video processing unit 110 and the microcomputer 120 are set to the slow reproduction mode. , And it is assumed that the shuffling memory 112 is controlled in a state different from a normal digital video processing operation. As described above, the noise removal operation of analog slow reproduction can be realized using the shuffling memory 112 for digital video processing.

In the above example, a video processing apparatus for recording and reproducing digital video data has been described as an apparatus having a function of reproducing analog video data.
The present invention is not limited to this, and may be a device having a function of recording and reproducing analog video data. Also, a case has been described in which a video tape is used as a recording medium for video data. In particular, for digital video data, a recording medium other than a tape, such as a disk-type recording medium of various types using light or magnetism, is used in combination. It may be. Further, the present invention is not limited to a portable video camera-type device, and can be similarly applied to a table-top type device. In the above example, in the slow playback mode, the control of the shuffling memory 112 is controlled by the vertical synchronization signal V.
And the capstan state signal (CAPON), but may be performed using another timing signal or the like.

[0024]

As described above, according to the video processing apparatus of the present invention, during the slow reproduction of the analog video data, the analog video reproduction data containing no noise is processed by the digital video processing in accordance with the operation of the recording / reproduction mechanism. Then, the data is selectively fetched into a shuffling memory, and slow reproduction without noise is performed using the data fetched into the shuffling memory. Therefore, noise removal in the slow reproduction of analog video data can be performed using a shuffling memory for shuffling digital video data in the digital video processing unit. Can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an outline of a system in a video processing device according to the present invention.

FIG. 2 is a block diagram showing a configuration of a data processing unit of the video processing device shown in FIG.

FIG. 3 is a block diagram illustrating a configuration of a digital video processing unit of the data processing unit illustrated in FIG. 2;

4 is an explanatory diagram showing a scanning path of a head during analog slow reproduction of the video processing device shown in FIG. 1;

FIG. 5 is an explanatory diagram showing a noise state of analog video data at the time of slow reproduction in the video processing device shown in FIG. 1;

FIG. 6 is an explanatory diagram showing a flow of analog reproduction data of a digital video processing unit during slow reproduction of the video processing device shown in FIG. 1;

FIG. 7 is an explanatory diagram showing a relationship between analog reproduction data and a status signal (CAPON) in the video processing device shown in FIG.

8 is a flowchart showing a control operation in a case where the video processing apparatus shown in FIG. 1 switches a mode of a shuffling memory and an operation of fetching and outputting data.

[Explanation of symbols]

10: Recording / reproducing mechanism unit, 20: Video camera unit, 3
0: LCD display unit, 40: Data processing unit, 50:
Operating unit, 60: power supply unit, 100: analog video processing unit, 110: digital video processing unit, 112: shuffling memory, 120: microcomputer.

Claims (9)

[Claims] A recording / reproducing mechanism for performing analog video reproduction and digital video recording / reproduction using a video tape;
A video processing device having a digital video processing unit that performs recording and reproduction processing of digital video data using the video tape, and an analog video processing unit that performs reproduction processing of analog video data using the video tape, A digital video processing unit, when recording the digital video data, a shuffling memory for performing shuffling processing of the digital video data, and at the time of slow reproduction of the analog video data, corresponding to the operation of the recording and reproduction mechanism unit Memory control means for selectively loading analog video playback data containing no noise into the shuffling memory, and performing slow playback without noise by using the data loaded into the shuffling memory. Video processing device. 2. The video processing apparatus according to claim 1, further comprising a video camera unit for capturing the digital video data, and an input terminal unit for inputting the digital video data from an external device. 3. The video processing apparatus according to claim 2, further comprising a display unit for displaying the reproduction data of the digital video and the analog video. 4. The video processing device according to claim 3, wherein the video processing device is provided in a portable case. 5. The video processing apparatus according to claim 1, wherein the shuffling memory is a memory including an area for storing one frame of video data. 6. The video processing device according to claim 1, wherein the shuffling memory is used for recording and reproducing a still image. 7. The memory control means switches and controls a driving mode of the shuffling memory according to a recording / reproducing mode of digital video data, a recording / reproducing mode of still image, and a slow reproducing mode of analog video data. The video processing apparatus according to claim 1, wherein the video processing is performed. 8. The recording / reproducing mechanism section performs slow reproduction of analog video data by intermittently driving the video tape, and the memory control section controls the video tape in response to intermittent driving of the video tape. 2. The video processing apparatus according to claim 1, wherein the reproduction data when the video tape is stopped is fetched into the shuffling memory, and the data fetched into the shuffling memory is output to a reproduction system when the video tape is driven. 9. The operation of selectively loading analog video reproduction data containing no noise into the shuffling memory is controlled based on an intermittent drive signal for intermittently driving a video tape in the recording / reproducing mechanism. The video processing apparatus according to claim 1, wherein the video processing is performed.