JPH04326271A - Recording or reproducing device - Google Patents

Abstract

PURPOSE:To obtain images having no horizontal distortion by recording information expressing the compressibility of image signals in a recording medium together with the image signals and outputting a control signal based on this compressibility information together with the image signals in the case of reproduction. CONSTITUTION:Input data ID showing the compressibility of the image signals inputted to an input terminal 10 are inputted to an input terminal 13, and an index code is generated at an input data processing circuit 14, modulated to an RF signal by a modulator 15 and inputted to a changeover switch 16. Under the control of a switching control circuit 32, the changeover switch 16 alternately switches video signals and the ID and inputs them to a head amplifier 17, and the amplified RF signal is recorded onto a magnetic tape 31. In the case of reproduction, the RF signal is amplified by a reproducing amplifier 20 and inputted to a changeover switch 21. The changeover switch 21 alternately switches the image signals and the index signal, for the index code demodulated at a demodulation circuit 25, the ID is discriminated at an output data processing circuit 26, and the control signal corresponding to the compressibility of the image signal is outputted.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for recording and reproducing image signals compressed in the horizontal time direction and having different aspect ratios.

0002

2. Description of the Related Art For example, image signals with different aspect ratios are recorded on an original image that has been linearly compressed in the horizontal time direction using a recording/reproducing device such as a VTR, and the reproduced output image signal is converted into a C.
If the image is directly inputted to a display means such as an RT monitor or a projector, or a print means such as a video printer, a displayed image or a print image output with distortion in the horizontal direction will be obtained.

0003

[Problems to be Solved by the Invention] Therefore, an image signal having a different aspect ratio from an original image that has been linearly compressed in the horizontal time direction cannot be directly input to display or printing means, and the compression ratio of the image signal cannot be inputted as is. There is a problem in that the operation of the display or printing means must be manually switched each time depending on the situation, which is time-consuming.

[0004] An object of the present invention is to provide a recording or reproducing apparatus that solves the above-mentioned problems.

[0005]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides means for recording an image signal compressed in the horizontal time direction and a compression ratio information signal related to the compression on a recording medium during recording; During reproduction, a reproduction means for reproducing a signal from a recording medium, an image signal output means for extracting and outputting the image signal from the signal from the reproduction means, and an image signal outputting means for extracting the compression ratio information signal from the signal from the reproduction means. The apparatus is characterized by comprising means for outputting a control signal for outputting the reproduced image signal in accordance with the compression ratio.

[0006]

According to the present invention, during recording, compression ratio information is recorded on a recording medium together with an image signal compressed in the horizontal time direction, and during playback, the image signal is extracted from the recording medium and output, and the compression ratio information is A control signal is output for extracting information and outputting the image signal in accordance with the compression ratio.

[0007]

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First Embodiment) FIG. 1 shows a magnetic recording/reproducing apparatus according to a first embodiment of the present invention, in which control of the compression ratio, etc. regarding input image signals is performed in the index area of an 8 mm video magnetic tape. This is a method for recording data (ID). FIG. 4 shows an index in a recording track on a magnetic tape, where an ID indicating a compression ratio as described later is used.
is written in the data area in the index area.

As shown in FIG. 1, an image signal linearly compressed in the horizontal time direction is input to an input terminal 10. The input image processing circuit 11 performs image processing such as separating the luminance signal and chrominance signal, aperture correction, and emphasis on the input image signal, and the modulator 12 converts the luminance signal into an FM signal and converts the chrominance signal into a low frequency signal. The signal is converted into a signal and inputted to one input terminal 16a of the changeover switch 16 as a recording RF signal.

Input data (ID) indicating the compression ratio of the image signal inputted to the input terminal 10 is inputted to the input terminal 13, and the input data processing circuit 14 divides it into blocks, adds error correction data, etc., and indexes it. A code is generated, modulated into an RF signal by the modulator 15, and inputted to the other input terminal 16b of the changeover switch 16. The changeover switch 16 alternately switches between the video signal and the ID using the changeover control circuit 32 and inputs the signal to the head amplifier 17 . The RF signal amplified by the head amplifier 17 is recorded on the magnetic tape 31 by the magnetic head 30 via a switch SW1 for switching between recording and reproduction.

During reproduction, the RF signal reproduced by the magnetic head 30 is amplified by the reproduction amplifier 20 via the switch SW1, and is input to the input terminal of the changeover switch 21. The changeover switch 21 alternately switches between an image signal and an index signal by a changeover control circuit 32, and the image signal is input to the demodulator 22 and the index signal is input to the demodulator 25. The image signal is demodulated by a demodulator 22, subjected to output image processing such as de-emphasis and noise reduction in an output image processing circuit 23, and then outputted to an output terminal 24 as an output image signal.

The index signal is demodulated by the demodulation circuit 25, and the demodulated index code is input to the output data processing circuit 26, where the ID is determined and the control signal is controlled according to the compression ratio of the output image signal. Output terminal 27
is output to. By controlling the image display means or printing means according to the image compression ratio using the control signal obtained in this manner, it is possible to obtain a display output or print output of an image free from distortion in the horizontal direction.

(Embodiment 2) FIG. 2 shows a second embodiment,
This method uses the user bit of the time code recorded on the cue track as an ID. FIG. 5 shows an SMPTE time code as an example of a time code.

As shown in FIG. 2, an input image signal input to an input terminal 40 is processed by an input image processing circuit 41 in the same manner as in the first embodiment, and then modulated by a modulator 42 and sent to a head amplifier. After being amplified in step 43, the signal is recorded on the magnetic tape 62 by the magnetic head 60 via the switch SW2.

The ID is inputted from an input terminal 44, and is inputted to an input data processing circuit 45 together with time code data inputted from an input terminal 48, where a time code is generated, which is modulated into a recording signal by a modulator 46. head amp 4
After being amplified in step 7, the signal is recorded on the cue track of the magnetic tape 62 by the magnetic head 61 via the switch SW3.

During reproduction, the image signal is reproduced by the magnetic head 60, passed through the switch SW2, amplified by the reproduction amplifier 50, demodulated by the demodulator 51, and subjected to image processing by the output image processing circuit 52 to produce an output image signal. The signal is output to the output terminal 53 as a signal. On the other hand, the time code signal reproduced by the magnetic head 61 is passed through the switch SW3, amplified by the reproduction amplifier 54, demodulated by the demodulator 55, and separated from the time code by the output data processing circuit 56 to determine the ID. A control signal regarding the compression ratio of the image signal is generated and outputted to an output terminal 57, and at the same time, a time code is outputted to an output terminal 58.

(Embodiment 3) FIG. 3 shows a third embodiment,
This method uses the user bit of the time code recorded in the vertical blanking portion as an ID. FIG. 6 shows VITC as an example of a time code.

As shown in FIG. 3, the image signal input to the input terminal 70 passes through an input image processing circuit 71 and is input to a mixing circuit 72, as in the first and second embodiments. The ID input from the input terminal 75 and the time code data input from the input terminal 77 are generated into a time code by the input data processing circuit 76, and the vertical blanking portion of the image signal from the input image processing circuit 71 is generated by the mixing circuit 72. superimposed on The image signal on which the time code has been superimposed is modulated into an RF signal by a modulator 73, amplified by a head amplifier 74, and then sent to a magnetic tape 9 by a magnetic head 90 via a switch SW4.
1 is recorded.

During reproduction, the RF signal reproduced by the magnetic head 90 is amplified by the reproduction amplifier 80 via the switch SW4, the image signal on which the time code is superimposed is demodulated by the demodulator 81, and the image signal on which the time code is superimposed is demodulated by the demodulator 81. The image signal and time code are separated, and the image signal is sent to the output image processing circuit 8.
3, the image is processed and output to an output terminal 84, while the time code is separated and discriminated by an ID in an output data processing circuit 85, and a control signal related to the compression ratio of the image signal is output to an output terminal 86, and the time code is output to an output terminal 84. Output the time code to 87.

[0020]

[Effects of the Invention] As explained above, according to the present invention,
By recording information representing the compression ratio of the image signal on a recording medium together with the image signal, a control signal based on the information is output together with the image signal during reproduction. by this,
For example, by controlling the image display means or printing means according to the image compression ratio, it is possible to obtain a display output or print output of an image without horizontal distortion.

[Brief explanation of the drawing]

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

FIG. 2 is a block diagram of another embodiment of the invention.

FIG. 3 is a block diagram of yet another embodiment of the invention.

FIG. 4 is a diagram illustrating an index of 8 mm video.

FIG. 5 is a diagram illustrating SMPTE time code.

FIG. 6 is a diagram illustrating VITC.

[Explanation of symbols]

10, 40, 70 Image input terminal 11, 41, 71 Input image processing circuit 12, 15, 4
2, 46, 73 Modulator 13, 44, 75 ID input terminal 14, 45, 76 Input data processing circuit 17, 43,
47, 74 Recording amplifier 20, 50, 54, 80
Reproduction amplifier 22, 25, 51, 55, 81 Demodulator 2
4, 53, 84 Image output terminal 27, 58, 86 Control signal output terminal 30, 60, 6
1,90 Magnetic head 31,62,91 Magnetic tape 32 Switching control circuit 72 Mixing circuit 82 Separation circuit

Claims (1)

[Claims] 1. Means for recording an image signal compressed in the horizontal time direction and a compression ratio information signal related to the compression on a recording medium during recording, and reproducing means for reproducing the signal from the recording medium during reproduction; image signal output means for extracting and outputting the image signal from the signal from the reproduction means; and image signal output means for extracting the compression ratio information signal from the signal from the reproduction means and outputting the reproduced image signal corresponding to the compression ratio. 1. A recording or reproducing device comprising means for outputting a control signal for performing.