JP2002152675A - Picture processor and picture processing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dub the moving picture of a desired scene in a card memory from a magnetic tape in a desired data quantity. SOLUTION: The start point (IN point) and the end point (OUT point) of the moving picture which is cut from the magnetic tape 18 are designated by an operation key 32. Then, data quantity M is set. A system control circuit 30 decides the number of pixels, the number of frames per unit time and a JPEG compression from the time between the IN point and the OUT point and designated data quantity M and reproduces the magnetic tape 18 from the IN point. Reproduced data is extended by a DV compression/expansion circuit 16, is compressed by a JPEG compression/expansion circuit 26 and is recorded in the card memory 28. Data is reproduced from the IN point to the OUT point and Motion-JPEG data quantity E is measured. When data quantity E exceeds data quantity M, recording into the card memory 28 is invalidated, the magnetic tape 18 is rewound to the IN point. The magnetic tape 18 is reproduced again from the IN point with compression higher than in previous time and data is recorded in the card memory 28. Data is reproduced from the IN point to the OUT point. When data quantity E is not more than setting data quantity M, dubbing is terminated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image processing apparatus and method for dubbing a moving image reproduced from a first recording medium to a second recording medium while compressing the moving image.

[0002]

2. Description of the Related Art As a device for digitally recording a moving image, a digital VTR is known. There is also a configuration in which a semiconductor memory, a hard disk or a magneto-optical disk is used as a recording medium other than a magnetic tape. In addition, V
Some products have a TR function, incorporate a removable card-type recording medium, and have a function of digitally recording a still image or a short moving image. Such products record image information from a camera on either a tape recording medium or a card type recording medium. Using such a product, it has become possible to take an image into a personal computer and attach image data to an e-mail.

[0003]

However, when an image attached to an e-mail is moving image data (hereinafter, referred to as a moving image clip), if the amount of data increases, it takes time to transmit the data. Must-have.

In a digital VTR, moving images are recorded on a magnetic tape by a recording method called a DV format.
Since the amount of data per unit time is large, it cannot be used for video clips as it is.

[0005] The recording medium of the card type has a smaller recording capacity than the tape-shaped recording medium, so that the moving image is recorded after being compressed at a high compression rate, and the recording time is shorter than that of the tape recording medium. Therefore, the scenes that can be recorded are limited.

An object of the present invention is to provide an image processing apparatus which solves such a problem.

It is another object of the present invention to provide an image processing apparatus and method for dubbing an image of a desired scene from a large-capacity recording medium to a small-capacity recording medium with a desired data amount.

[0008]

According to the present invention, there is provided an image processing apparatus comprising: a first recording medium for recording a moving image; and a range for designating a reproduction range of the moving image recorded on the first recording medium. Specifying means, reading means for reading a moving image in a range specified by the range specifying means from the first recording medium, recording data amount specifying means for specifying a recording data amount,
Compressing the moving image read by the reading means,
It is characterized by comprising compression means for recording on the second recording medium, and control means for controlling compression conditions of the compression means in accordance with the data amount designated by the recording data amount designation means.

An image processing method according to the present invention is an image processing method for dubbing a desired portion of a moving image recorded on a first recording medium to a second recording medium with a desired data amount,
A range specifying step of specifying a dubbing range in a moving image recorded on the first recording medium; a recording data amount specifying step of specifying a recording data amount when recording on the second recording medium; A reading step of reading a moving image in a range specified in the range specifying step from the first recording medium, a compression step of compressing the moving image data read in the reading step, and a moving image compressed in the compression step A writing step of writing an image on the second recording medium; a data amount determining step of determining whether an amount of data written to the second recording medium exceeds a data amount specified in the recording data amount specifying step; If the amount of data to be written to the second recording medium exceeds the amount of data specified in the recording data amount specifying step, the compression in the compression step Change the parameters, the reading step, characterized by comprising a control step of retrying the compression step and the writing step.

An image processing method according to the present invention is an image processing method for dubbing a desired portion of a moving image recorded on a first recording medium to a second recording medium with a desired data amount.
A range specifying step of specifying a dubbing range in a moving image recorded on the first recording medium; a recording data amount specifying step of specifying a recording data amount when recording on the second recording medium; The moving image in the range specified in the range specifying step is read out from the first recording medium, compressed using a compression parameter corresponding to the recording data amount specified in the recording data amount specifying step, and read out from the second recording medium. And a trial step of measuring the actual amount of data recorded on the second recording medium during that time.
When the amount of data to be written to the second recording medium exceeds the amount of data specified in the recording data amount specifying step, the change of the amount of recording data is prompted, and the amount of data to be written to the second recording medium is changed to the recording data amount specifying step. A recording data amount changing step of maintaining the recording data amount when the data amount does not exceed the specified amount, a reading step of reading a moving image in a range specified by the range specifying step from the first recording medium, A compression step of compressing the moving image data read in the reading step under a compression condition corresponding to a recording data amount in the recording data amount changing step;
A writing step of writing the moving image compressed in the compression step on the second recording medium.

[0011]

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

FIG. 1 is a schematic block diagram showing the configuration of an embodiment of the present invention. 10 is a photographing lens, 12 is an image sensor, 1
Reference numeral 4 denotes a camera signal processing circuit for processing an output signal of the image sensor 12, and reference numeral 16 denotes a DV compression / expansion circuit for compressing and rearranging the output video signal of the camera signal processing circuit 14 so as to be in a DV recording format and expanding the video signal during reproduction. is there. 18
Is a magnetic tape for recording moving images, 20 is a rotating drum having a magnetic head for recording and reproducing images on the magnetic tape 18, 2
Reference numeral 2 denotes a mechanism control circuit for controlling the running of the magnetic tape 18.

A switch 24 selects an output video signal of the camera signal processing circuit 14 or an output video signal of the DV compression / expansion circuit 16. A switch 26 converts the video signal selected by the switch 28 into a still image recording format such as JPEG. Alternatively, a JPEG compression / expansion circuit which performs rate conversion and data compression so as to have a simple moving image recording format such as Motion-JPEG and decompresses the data during reproduction.
It is a card memory which is a recording medium for G data. Reference numeral 30 denotes a system control circuit for controlling the whole, and 32 denotes operation keys.

The operation of recording a moving image on the magnetic tape 18 will be described. The image sensor 12 converts an optical image obtained by the photographing lens 10 into an electric signal. The camera signal processing circuit 14 processes an image signal applied from the image sensor 12 to generate a luminance / color difference signal. The DV compression / expansion circuit 16 compresses the video signal output from the camera signal processing circuit 14, and the output data is recorded on the magnetic tape 18 by the magnetic head of the rotating drum 20 in the DV recording format. Generally, a moving image of 30 minutes to 90 minutes can be recorded on the magnetic tape 18.

In this embodiment, a desired scene can be extracted from a moving image recorded on the magnetic tape 18 and dubbed to the card memory 28. Referring to the flowchart shown in FIG.
The operation will be described.

It is determined whether the mode is the moving image clip mode (S1). When the moving image clip mode is instructed by the operation key 32, the start point (IN point) and the end point (OUT point) of the moving image cut out from the magnetic tape 18 are designated (S).
2). The time code may be used, but the mechanism control circuit 22 is operated by the operation keys 32, and I
The N point and the OUT point may be set. At the same time, a convenient data amount M is set.

The number of pixels, the number of frames per unit time, and the JPEG compression ratio are determined by predetermined parameters from the time between the IN point and the OUT point and the designated data amount M (S3). Reproduce. The reproduced data is decompressed by the DV compression / decompression circuit 16, and the JPEG compression / decompression circuit 26 performs Motion-J
The data is compressed in the PEG format and recorded in the card memory 28 (S4). Play from the IN point to the OUT point.
Then, the amount E of the option-JPEG data is measured (S5).
When the data amount E exceeds the set data amount M (S6), the recording to the card memory 28 is invalidated, and the mechanism control circuit 22
To rewind the magnetic tape 18 to the IN point (S7),
The number of frames is reduced or the compression ratio is increased from the previous time (S4), and the magnetic tape 18 is reproduced again from the IN point, and is similarly recorded in the card memory 28 (S5).

When the data is reproduced from the IN point to the OUT point and the data amount E is equal to or less than the set data amount M (S6), the dubbing is terminated (S8), and the range designation of the IN point and the OUT point is cleared (S9). .

FIG. 3 shows an example of reducing the number of pixels and the number of frames per unit time. Moving images are recorded on the magnetic tape 18 in the DV format. 2 fields to 1
It is composed of frames and is compressed. During playback,
Only one of the two fields constituting one frame is used for a moving image clip. The image is extracted every other frame. As a result, the number of fields to be reproduced is usually 1
That is, it was thinned out to / 4. Further, the number of pixels in the horizontal direction is rate-converted so as to form a square lattice, JPEG-compressed, and recorded in the card memory 28 as a Motion-JPEG file. By inserting the card 28 into a reading device connected to a personal computer, a desired moving image can be captured with a desired data amount.

FIG. 4 shows another operation flowchart of this embodiment. Determine whether the mode is the video clip mode (S
11). A desired data amount M is set using the operation keys 32 (S12). The start point (IN point) of the moving image cut out from the magnetic tape 18 is set (S13), the magnetic tape 18 is advanced to the desired end point (OUT point) by normal reproduction or immediately, and the OUT point is set (S14). .

The number of pixels, the number of frames per unit time, and the JPEG compression ratio are determined according to the time between the IN point and the OUT point and the set data amount M (S15). (S16). The reverse playback speed may be the normal playback speed or lower. The data amount E until returning to the IN point is measured (S1
7) The number of pixels, the number of frames per unit time, and the JPEG compression ratio are reset by comparing with the set data amount M (S1).
8).

Next, the magnetic tape 18 is reproduced from the IN point to the OUT point, the reproduced data is decompressed by the DV compression / decompression circuit 16, and further, the JPEG compression / decompression circuit 26 performs the Motion-
The data is compressed in the JPEG format and recorded in the card memory 28 (S19). The tape running is stopped at the OUT point, dubbing is terminated (S20), and the range designation of the IN point and the OUT point is cleared (S21).

FIG. 5 shows the reproduction direction after the setting of the OUT point is completed. The reverse reproduction is performed up to the IN point while measuring the data amount, the data amount E is measured before returning to the IN point, and then the magnetic tape 18 is normally reproduced from the IN point to the OUT point to perform dubbing.

With the above simple operation, a desired moving image portion can be stored in the memory 28 with a desired data amount.

Although a combination of a magnetic tape and a card memory has been described as a recording medium, it is obvious that other recording sellers, for example, a magnetic disk or a magneto-optical disk may be used.

[0026]

As can be easily understood from the above description, according to the present invention, a desired portion of a moving image recorded on the first recording medium is reduced by a simple operation so as to have a desired data amount. 2 can be dubbed.

[Brief description of the drawings]

FIG. 1 is a schematic block diagram of an embodiment of the present invention.

FIG. 2 is an operation flowchart of the embodiment.

FIG. 3 is a schematic diagram illustrating an operation corresponding to FIG. 2;

FIG. 4 is another operation flowchart of the embodiment.

FIG. 5 is a schematic diagram illustrating an operation corresponding to FIG. 4;

[Explanation of symbols]

 10: Photographic lens 12: Image sensor 14: Camera signal processing circuit 16: DV compression / expansion circuit 18: Magnetic tape 20: Rotating drum 22: Mechanism control circuit 24: Switch 26: JPEG compression / expansion circuit 28: Card memory 30: System control Circuit 32: Operation keys

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5C052 AA01 AA17 CC06 CC11 GA01 GA04 GB06 GD09 GE08 5C053 FA15 FA22 FA27 GB21 GB28 GB36 HA25 HA29 KA08 KA24 LA01 5C059 LB07 MA00 PP04 SS11 SS14 TA06 TA07 TB01 TC15 UA02

Claims (3)

[Claims] 1. A first recording medium for recording a moving image, a range designating means for designating a reproduction range of the moving image recorded on the first recording medium, and a range designated by the range designating means The moving image in the range
Reading means for reading from the recording medium, a recording data amount specifying means for specifying a recording data amount, and compressing a moving image read by the reading means,
An image processing apparatus comprising: compression means for recording on a second recording medium; and control means for controlling a compression condition of the compression means in accordance with a data amount designated by the recording data amount designation means. 2. An image processing method for dubbing a desired portion of a moving image recorded on a first recording medium to a second recording medium with a desired data amount, wherein the dubbing is performed on the first recording medium. A range specifying step of specifying a dubbing range in the moving image; a recording data amount specifying step of specifying a recording data amount when recording on the second recording medium; and a moving image of the range specified by the range specifying step A reading step of reading an image from the first recording medium, a compression step of compressing the moving image data read in the reading step, and writing the moving image compressed in the compression step to the second recording medium A writing step; and a data amount determining step of determining whether the amount of data to be written to the second recording medium exceeds the data amount specified in the recording data amount specifying step. And when the amount of data to be written to the second recording medium exceeds the amount of data specified in the recording data amount specifying step, the compression parameter of the compression step is changed and the read step, the compression step, and the A control step of retrying the writing step. 3. An image processing method for dubbing a desired portion of a moving image recorded on a first recording medium to a second recording medium with a desired data amount, wherein the dubbing is performed on the first recording medium. A range specifying step of specifying a dubbing range in the moving image; a recording data amount specifying step of specifying a recording data amount when recording on the second recording medium; and a moving image of the range specified by the range specifying step Reading an image from the first recording medium, compressing the image with a compression parameter corresponding to the recording data amount specified in the recording data amount specifying step, writing the image on the second recording medium,
A trial step of measuring the actual amount of data recorded on the second recording medium during that time; and, if the amount of data written to the second recording medium exceeds the data amount specified in the recording data amount designating step, A recording data amount changing step of prompting a change in the recording data amount, and maintaining the recording data amount if the writing data amount to the second recording medium does not exceed the data amount specified in the recording data amount specifying step; A reading step of reading a moving image in a range specified in the range specifying step from the first recording medium; and a moving image data read in the reading step.
A compression step of compressing under a compression condition according to a recording data amount in the recording data amount changing step, and a writing step of writing a moving image compressed in the compression step to the second recording medium. Image processing method.