JPH03276470A - Method and device for recording picture data to tape-shaped recording medium - Google Patents

Abstract

PURPOSE:To record a data showing still pictures by plural frames by one effort by arranging a recording unit data obtained by dividing the still picture data of plural frames in order of the frame number from the lead and recording them in turn. CONSTITUTION:RAM 21-2n of the picture data recording device are stored with inputting picture data by one frame to each RAM, and when an address signal is given by an address signal generating circuit 30, the picture data is read out of the RAM 21-2n simultaneously by a prescribed length respectively and sent to a signal processing circuit 40. In the signal processing circuit 40, these pieces of data are processed with PCM modulation, error correction processing and synchronous lead addition processing, etc., and converted into a format for the purpose of recording, and then the recording unit data by one track is arranged in order of the frame number and given to a recorder 41 and then recorded to a tape-shaped recording medium. Consequently, since the data showing still pictures by plural frames can be recorded by one effort, it is not necessary for the recording medium to provide with a waiting section for stabilization of a reproducing servo, and also the need for a reproducing operation for adjusting a recording position of each screen is eliminated as well.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for recording image data on a tape-shaped recording medium.

Conventional technology and its problemsStill images give a different impression to people than moving images (movies), and in particular, they have a feature that moving images do not have in that they can fix images at a specific moment. is being explored. Electronic still cameras (still video cameras) and still image playback devices have already been put into practical use.

Also, something like an electronic album has been proposed. The electronic album contains many still images taken.

In some cases, the still image is recorded along with the sound associated with it, and a tape-shaped magnetic recording medium such as a digital audio tape is considered as one of the recording media. Image digital data representing multiple frames of still images are recorded on a magnetic tape in a fixed order, possibly together with digital data representing sound.

Figure 3 shows still images (
This shows a method for recording data (and sound).

Multiple frames of still image data are stored with appropriate margins in the longitudinal direction of the magnetic tape.

Each screen is recorded to form a block. In this type of recording method, the tape length of a recording block for one screen is short, so there is a waiting period (the above margin; about 1 to 3 seconds in time) for the reproduction servo to stabilize each time each still image is reproduced. This margin is a waste of tape.

Furthermore, since the tape is stopped frame by frame during recording, a playback operation is required to align the recording position.

SUMMARY OF THE INVENTION OBJECTS OF THE INVENTION An object of the present invention is to provide a recording method and apparatus capable of recording/reproducing a plurality of frames of still images without repeating the feeding/stopping of a tape-shaped recording medium.

Structure 9 of the Invention Function and Effect The method of recording an image of a pig on a tape-shaped recording medium according to the present invention divides still image data of a plurality of sternums into a large number of recording unit data, and divides these recording unit data into the first one. It is characterized in that each recording unit data is arranged in the order according to the frame number and sequentially recorded on the tape-shaped recording medium.

The apparatus for recording image data on a tape-shaped recording medium according to the present invention includes a plurality of image data storage means each storing still image data of a plurality of sternums frame by frame, and a plurality of image data storage means that stores the stored image data. 1 that constitutes
readout control means for controlling the reading of recording unit data of each unit; signal processing for converting the recording unit data of a plurality of sternums read by the readout control means into a predetermined recording format and arranging them in an order according to the frame number; and recording means for recording the recording unit data arranged by the signal processing means on a tape-shaped recording medium in the arrangement order.

According to this invention, data representing still images of multiple sternums are interwoven with each other in the order of frame numbers for each recording unit data that constitutes the data, and are recorded all at once. There is no such thing as regeneration. Therefore, there is no need to provide a reproduction servo stabilization waiting period as in the prior art, and there is no need for a reproduction operation for adjusting the recording position for each screen.

Preferably, the still image data is composed of index data and main image data. and.

The recording unit data of the index data of the plurality of sternums is arranged in the order according to the frame number and sequentially recorded in the leading area of the tape-shaped recording medium, and the recording unit data of the main image data of the plurality of sternums is arranged in the order according to the frame number. and sequentially record it in the succeeding area following the preceding area.

By recording in this manner, all the index data for a plurality of screens can be obtained by simply reproducing the preceding area during playback, making it possible to quickly search for a desired screen.

It goes without saying that not only image data but also data representing sounds associated with each image can be divided into recording unit data and recorded along with the five-image recording unit data.

DESCRIPTION OF EMBODIMENTS FIG. 1 is a block diagram showing an embodiment of an image data recording apparatus according to the present invention, and FIG. 2 shows a recording format of image data on a magnetic tape (for example, a digital audio tape).

In this embodiment, one frame of still image data is composed of index data and main image data. Index data is data that can specify the still image, and may be character data representing the type of image, date of shooting, etc., or image data representing an outline of the image itself. The main image data is data representing the still image itself. For example, image data is DCT
(Discrete Co51ne Transf'o
If the data is compressed by conversion), the DC component data may be used as index data, and the AC component data may be used as main image data. The contrast data (DC component data) represents the brightness and darkness outline of the image, and both the index data and main image data (AC component data) represent the image down to its details.

As shown in FIG. 2, the magnetic tape 50 has an index data area and a main image data area. The index data area precedes the main image data area.
The area follows. Index data of still images for n frames (n is a positive integer of 2 or more, for example n-18) is recorded in the index data area. Main image data of a still image of the n sternum is also recorded in the main image data area.

The index data of each still image is divided into recording unit data of appropriate length. The main image data of each still image is similarly divided into recording unit data of appropriate length.

The magnetic tape 50 is provided with oblique recording tracks TR. In the index data area, the first recording track TR contains the first recording unit data of the index data of still images of n sternums.

The images are recorded in a fixed image order (in order of frame number). Similarly, in the second track TR, the second recording unit data of the index data of the still image of the n sternum is recorded in the order of the frame number. In this way, the index
The data area includes an index of still images of the n sternum.
For each recording track, one unit of data is arranged and recorded in the order of frame numbers. In exactly the same way, in the main image data area, main image data of still images of n sternums are recorded in every seven recording tracks, one recording unit data of each of them, arranged in the order of frame numbers.

Even if there is sound data representing sound associated with each still image, this sound data is divided into recording unit data and recorded along with the recording unit image data. That is, recording unit data of one image data and recording unit data of sound data constitute one recording unit data.

In FIG. 1, an image data recording device 2 according to the present invention is shown.
0 is given image data of n sternum from the image input device 10. For example, the image input device IO may be a still/video/video input device.
It may be a photographing device such as a camera, or a recording device or storage device such as a memory card. The image data provided to the recording device 20 may of course be compressed image data.

The image data recording device 20 includes n RAMs 21 to 2n. These RAMs 21 to 2n store input image data one frame at a time. The image data recording device 20 is also. The address signal generating circuit 30 is equipped with a signal processing circuit 40 and a recorder 41. When the address signal generation circuit 30 applies address signals to the RAMs 21 to 2n, image data of a predetermined length is simultaneously read out from these RAMs 21 to 2n and sent to the signal processing circuit 40. The predetermined length of image data that is read out by one address designation may correspond to the recording unit data recorded on the above-mentioned magnetic tape, or may be several times or a fraction thereof.

Preferably, the RAMs 21 to 2n include a magnetic tape 501;
The image data is stored in the order in which the data was recorded, and read out in that order. For example, if one image data is compressed by DCT transformation, it is read out in the order of DC component and then DC component.

It is preferable that the data is read out in the order in which it is recorded among the DC component or AC component data. If the index data recorded in the index φ data area is composed of a set of data obtained by thinning out data representing the image outline from the image data, the address signal generation circuit 30 would be configured to generate discrete addresses so that only the index data is first read from the RAMs 21-2n.

In any case, at least 1 each for n sternum
When recording position data is given to the signal processing circuit 40, the signal processing circuit 40 performs PCM modulation, error correction processing, synchronous read addition processing, etc. on these data and converts them into a format for recording. , recording unit data for at least one track is arranged in the order of frame numbers so as to be recorded in the format shown in FIG.
given to 1. The recorder 41 includes a recording head, and records given recording data on the magnetic tape 50 by scanning the magnetic tape 50 diagonally.

Reading of image data from the RAMs 21 to 2n, signal conversion and arrangement processing in the signal processing circuit 40, and data recording on the magnetic tape in the recorder 41 are performed in real time.
The magnetic tape 50 has a second
As shown in the figure, n sternum image data or recording unit data are recorded in a fixed order in all tracks of the index data area and main image data area.

In this way, a device that reproduces n sternum image data recorded on a magnetic tape reads recording unit data for each track from the magnetic tape, converts it to reproduction data, distributes it to each frame, and It is stored in the memory provided for each. To reproduce n sternum images, n memories are required, but several m memories, which are smaller than n, are provided.

Only m images may be reproduced.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of an image data recording apparatus according to the present invention, and FIG. 2 shows a recording format of image data on a magnetic tape in the recording apparatus shown in FIG. FIG. 3 shows a recording format of image data on a magnetic tape in a conventional recording device. 20... Image data recording device. 21-2n=-RAM. 30...Address signal generation circuit. 40... Signal processing circuit. 41...Recorder. 50...Magnetic tape. that's all

Claims (4)

[Claims] (1) Multiple frames of still image data are each divided into a large number of recording unit data, and these recording unit data are arranged in order according to the frame number for each recording unit data starting from the first one, and sequentially recorded on tape. A method for recording image data on a tape-shaped recording medium. (2) Still image data is composed of index data and main image data, and the recording unit data of index data for multiple frames are arranged in the order according to the frame number and sequentially recorded in the preceding area of the tape-shaped recording medium. Image data on a tape-shaped recording medium according to claim (1), wherein recording unit data of main image data for a plurality of frames are arranged in an order according to frame numbers and sequentially recorded in a subsequent area following a preceding area. How to record. (3) Claim (1) wherein one recording unit data for a plurality of frames is recorded on one track formed on the recording surface of a tape-shaped recording medium.
The method for recording image data on a tape-shaped recording medium according to 1) or (2). (4) A plurality of image data storage means each storing still image data for a plurality of frames frame by frame; reading one unit of recording unit data constituting the stored image data from the plurality of image data storage means; readout control means for controlling the readout, signal processing means for converting the plurality of frames of recording unit data read out by the readout control means into a predetermined recording format and arranging the data in an order according to the frame number, and the signal processing means. A recording device for recording image data on a tape-shaped recording medium, comprising: recording means for recording arranged recording unit data on the tape-shaped recording medium in the sequence of the arrangement.