JP2803042B2 - Image information recording device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an image information recording device that also records an image information signal. [Prior Art] For example, in a conventional so-called 8 mm video tape recorder (VTR), a function for recording and reproducing only a still image is not particularly added. Then, a still image is reproduced by extracting an image for one field or one frame from the moving image recorded on the tape and reproducing it every time. [Problems to be Solved by the Invention] However, when a still image is reproduced by extracting, for example, one frame signal from a moving image signal as described above, if the image is reproduced as a moving image signal, the image is originally sufficiently viewed. Even if the image quality can endure, the S / N is visually deteriorated and the image is blurred when reproduced as a still image. An object of the present invention is to eliminate the conventional disadvantages as described above,
An object of the present invention is to provide an image information recording device capable of recording a high-quality still image signal in a short time. [Means for Solving the Problems] An image information recording apparatus of the present invention is an apparatus that forms a plurality of tracks on a recording medium and selectively records a moving image signal and a digital still image signal, Generating means for generating the digital still image signal, storage means for storing the digital still image signal generated by the generating means, and dividing the digital still image signal read from the storage means into a plurality of blocks, Encoding means for encoding each of the plurality of blocks; and recording means for recording the moving image signal and the digital still image signal on a plurality of tracks on the recording medium, wherein the recording of the moving image signal is performed. Means for recording a moving image on a plurality of tracks on the recording medium by means, and prohibiting recording of the moving image on the plurality of tracks. And a digital still image recording mode for recording the plurality of blocks encoded by the encoding means on each of a plurality of tracks on the recording medium. [Operation] According to the present invention, in recording a digital still image, recording of a moving image on a plurality of tracks is prohibited, and each of a plurality of tracks on a recording medium is divided into a plurality of blocks and encoded. Record a still image. Examples Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 shows the present invention as an embodiment of the present invention in an 8 mm VTR.
FIG. 3 is a diagram showing a schematic configuration in the case where the present invention is applied to FIG. In FIG. 1, first, when a moving image signal is recorded, an analog video signal is input from an input terminal 1, and when recording a moving image, the moving image is recorded and reproduced via a switch 2 connected to the M side in the figure. The signal is input to a signal processing circuit 3, where the analog video signal is separated into a luminance signal and a chrominance signal, converted into a signal form suitable for recording, and a tracking control signal generated by a tracking control signal generation circuit 4 is converted into a signal. After frequency multiplexing in the tracking control signal multiplexing circuit 5, a moving image information signal is converted into a well-known 8 mm VTR by a recording / reproducing unit 6 including a rotating head, a magnetic tape, and a tape running system (not shown). Can be recorded above. In the case of reproducing a moving image, the switch 19 is connected to the M side in the figure, and the recording information signal on the magnetic tape is reproduced by the rotating head in the recording / reproducing unit 6, and the reproduced information signal is used as a tracking control signal separating circuit. After the tracking control signal is separated in 16, the signal is supplied to the moving image recording / reproducing signal processing circuit 3, where it is subjected to well-known reproduction signal processing, and is output as the reproduced moving image video signal via the switch 19. The recording / reproducing unit 6 performs tracking control using the tracking control signal separated by the tracking control signal separation circuit 15. In the case of recording a still image, the switch 2 is connected to the S side in the figure, and an analog video signal is supplied to an analog / digital (A / D) converter 7 via the switch 2. Then, the A / D converter 7 converts the analog video signal into digital image data. Reference numeral 8 denotes a frame memory, which controls the writing operation of the frame memory 8 by the memory control circuit 10 in synchronization with the digital image data from the A / D converter 7 in synchronization with the timing signal output from the timing signal generation circuit 9. As a result, one frame worth of still image data is stored. After one frame of still image data is stored, the still image data is read out of the frame memory 9 in series by controlling the reading operation of the frame memory 8 by the memory control circuit 10 in synchronization with the timing signal. The multiplied / demultiplexed signal is input to a multi / demultiplexer 11, and the multi / demultiplexer 11 divides the signal into six, for example, and performs six PCM signal processing circuits for performing modulation / demodulation processing in parallel based on pulse code modulation (PCM). 12A-12F
, And simultaneously encoded with well-known ECC data and various control signals in each of the PCM signal processing circuits 12A to 12F, then encoded and input to the demultiplexer / multiplexer 13 in parallel. PCM-converted still image data input in parallel is taken out from the demultiplexer / multiplexer 13 in series,
In the recording signal processing circuit 14, the signal is converted into a signal form suitable for recording, and the tracking control signal is multiplexed in the tracking control signal multiplexing circuit 5 and supplied to the recording / reproducing section 6, as described above. At 6,
The data is recorded in six recording areas on the magnetic tape as described below by a rotating head (not shown). Note that the timing signal generation circuit 9 is provided in the frame memory 8.
The frame memory 8, the multi / demultiplexer 11, and the PCM so that the still image data for one frame or one field stored in the
Signal processing circuits 12A to 12F and demulti / multiplexer
13 generates a timing signal for controlling the operation timing. That is, as shown in FIG. 3, the recording area at the time of recording a still image on the magnetic tape is divided into six recording areas 1 ′, The image data is divided into 2 ', 3', 4 ', 5' and 6 ', and PCM-converted still image data output from each of the six PCM signal processing circuits 12A to 12F is sequentially recorded in each area. In FIG. 3, the recording area 1 'is a conventional 8 mm VTR.
In the standard PCM signal recording area, the remaining recording area (2 '~
6 ') corresponds to the video signal recording area. FIG. 2 is a diagram showing the processing timing of digital image signals in the PCM signal processing circuits 12A to 12F. That is, a) shows a state in which the digital image data for one field is divided into six blocks by the multi / demultiplexer 11 every time corresponding to one field period, and b-
1) is the first one of the six blocks and the first
3B shows input data of the PCM signal processing circuit 12A, b-2) shows output data of the circuit, and c) shows output data of the demultiplexer / multiplexer 13. The amount of information taken out from the frame memory 8 can be 8.4K bits in each of the above-mentioned six blocks in the case of the 8 mm VTR standard. It takes about 0.8 seconds for a 2.4 Mbit image, and about 3.3 seconds for a high-quality still image (10 Mbits of information). For example, this value is obtained when a still image information signal is recorded only in the conventional 8 mm VTR standard PCM area (that is, one track) (standard: about 4.8 seconds, high image quality:
Much shorter than about 20 seconds). At the time of reproducing a still image, the recording information signal on the magnetic tape is reproduced by the rotating head in the recording / reproducing unit 6, and the reproduced information signal is separated from the tracking control signal by the tracking control signal separating circuit 16.
The recording / reproducing unit 6 performs tracking control by using the separated tracking control signal. The information signal from which the tracking control signal has been separated is subjected to signal processing at the time of reproduction by the signal processing circuit 16 at the time of reproduction, and is input in series to the demultiplexer / multiplexer 13 so that the PCM signal processing circuits 12A to 12F
Are input in parallel to each other, demodulated, input to the multi / demultiplexer 11, taken out in series, and stored in the frame memory 8. The frame memory 8 is a memory control circuit.
The still image data read from the frame memory 8 is digital / analog (A / A
D) After being supplied to the converter 17 and converted into an analog signal,
Signal processing during reproduction, such as amplification, is performed by the still image reproduction signal processing circuit 18 and supplied to the switch 19 as a still image video signal. Output. The memory control circuit 10 controls the writing and reading operations of the frame memory 8 depending on whether to perform still image recording or still image reproduction. [Effects of the Invention] As described above, according to the present invention, for example, when a digital still image is recorded, recording of a moving image on a plurality of tracks is prohibited, and a plurality of blocks are placed on each of a plurality of tracks on a recording medium. By recording a digital still image that has been divided and coded into a single track, a high-quality digital still image can be recorded in a shorter time than when a moving image and a digital still image are mixed and recorded on one track. Can be.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic block diagram showing the case where the present invention is applied to an 8 mm VTR as an embodiment of the present invention. FIG. 2 is a digital diagram of the PCM signal processing circuits 12A to 12F shown in FIG. FIG. 3 is a diagram showing processing timing of an image signal. FIG. 3 is a diagram showing a recording format on a magnetic tape. 8: Frame memory, 11: Multi / demultiplexer, 12A to 12F: PCM signal processing circuit, 13: Demulti / multiplexer.

Continuation of front page       (56) References JP-A-58-222402 (JP, A)                 JP-A-59-113513 (JP, A)                 JP-A-61-152180 (JP, A)                 JP-A-61-68706 (JP, A)                 JP-A-61-148979 (JP, A)                 60-68760 (JP, U)

Claims (1)

(57) [Claims] An apparatus for forming a plurality of tracks on a recording medium and selectively recording a moving image signal and a digital still image signal, wherein the digital still image signal is generated by the generating unit, and the digital still image signal is generated by the generating unit. A storage unit that stores a digital still image signal, an encoding unit that divides the digital still image signal read from the storage unit into a plurality of blocks, and encodes each of the plurality of blocks. Recording means for recording the digital still image signal on a plurality of tracks on the recording medium, a moving image recording mode for recording the moving image signal on a plurality of tracks on the recording medium by the recording means, The recording of the moving image on the plurality of tracks is prohibited, and the recording unit applies the encoding to the plurality of tracks on the recording medium. Ri image information recording apparatus characterized by comprising a digital still image recording mode for recording a coded plurality of said blocks.