JP2010268335A - Recording/reproducing system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a recording device which records and reproduces a 4:4:4 RGB signal without using a conversion device. <P>SOLUTION: The recording/reproducing system include a recording unit and a reproducing unit. The recording unit includes: an imaging part 201 for capturing an object as a moving image, a 4:2:2 compression part 202 for compressing the captured moving image into a 4:2:2 YC signal, a 0:2:2 compression part 204 for compressing the captured moving image into a 0:2:2 YC signal, and a transmission part 203 for combining the 4:2:2 YC signal and the 0:2:2 YC signal to form a video signal in variable frame rate recording and transmitting it to a transmission path. The reproducing unit includes: a reception part 211 for receiving the video signal from the transmission path, a 4:2:2 decompression part 212 for decompressing the received video signal into the 4:2:2 YC signal, a 0:2:2 decompression part 214 for decompressing the received video signal into the 0:2:2 YC signal, and a combining part 213 for combining the decompressed 4:2:2 YC signal and the decompressed 0:2:2 YC signal to form the RGB signal. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a recording / reproducing system for performing variable frame rate recording in a moving image recording / reproducing system.

  As a conventional recording apparatus, for example, there is a recording apparatus described in Patent Document 1. FIG. 5 shows a conventional recording / reproducing system described in Patent Document 1. In FIG. 5, a recording apparatus having an imaging unit 101, a data conversion unit 102, a compression unit 103, and a transmission unit 104, a reproduction unit having a reception unit 111, an expansion unit 112, and a data conversion unit 113. And a recording / reproducing system. When shooting with a recording device, the imaging unit 101 takes a shot moving image and outputs a 4: 4: 4 format RGB signal. The data conversion unit 102 allocates two pixels of the 4: 4: 4 format RGB signal to three pixels of the 4: 2: 2 format and converts them into 2-channel video data. The compression unit 103 converts the video data into a 4: 2: 2 format video signal conforming to the SMPTE274M standard, and the transmission unit 104 transmits the video data from the transmission path. On the other hand, when a moving image is played back by a playback device, the receiving unit 111 receives a video signal from the transmission path, and the decompressing unit 112 extracts the video data of the 4: 2: 2 format for the two pixels from the video signal, and the data The conversion unit 113 restores the three pixels of the video data by assigning them to 4: 4: 4 RGB signals.

  As described above, the method in the above-mentioned patent document converts the 4: 4: 4 RGB signal into a 4: 2: 2 video signal during recording and restores the 4: 4: 4 RGB signal during reproduction. It is.

JP 2004-248264 A

  However, in the conventional configuration, a 4: 4: 4 RGB signal is converted into a 2-channel 4: 2: 2 video signal, and then converted into a 4: 2: 2 video signal in accordance with the SMPTE274M standard. Therefore, the conversion means and the restoration means are required, and there is a possibility that the video is deteriorated due to the conversion and restoration until the recorded video is reproduced.

  SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described conventional problems, and to provide a recording / reproducing system capable of transmitting 4: 4: 4 RGB signals without requiring a conversion device.

  In order to solve the above-described conventional problems, the recording / reproducing system of the present invention includes an image sensor, and images an object at a first frame rate by the image sensor and outputs an RGB signal in 4: 4: 4 format. A 4: 2: 2 compression unit that compresses RGB signals into a 4: 2: 2 format YC signal, and a 0: 2: 2 compression unit that compresses RGB signals into a 0: 2: 2 format YC signal. Transmission for transmitting a video signal obtained by combining a second frame rate that is at least twice the first frame rate from a 4: 2: 2 format YC signal and a 0: 2: 2 format YC signal to a transmission line A receiving device that receives a video signal from a transmission path and divides the video signal into a 4: 2: 2 format YC signal and a 0: 2: 2 format YC signal, and 4: 2: 2. 4: 2: 2 decompression unit that decompresses YC signals in format and 0: 2: 2 format YC signals The 0: 2: 2 decompression unit, the decompressed 4: 2: 2 format YC signal, and the decompressed 0: 2: 2 format YC signal are combined to form the 4: 4: 4 format of the first frame rate. And a recording unit including a reproducing unit including a coupling unit for converting the RGB signals.

  According to the present invention, by adding a 0: 2: 2 YC signal recording device to a conventional variable frame rate recording device, a 4: 4: 4 ratio is not required without adding a capacity of a conversion device or a recording medium. Transmission of RGB signals becomes possible.

Block configuration diagram in the embodiment Flowchart in the embodiment The figure which shows the structure of the video signal in embodiment The figure which shows the YC signal and RGB signal in embodiment Block diagram of a conventional recording apparatus

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

  FIG. 1 is a block diagram of a recording / reproducing system according to the present embodiment.

  The recording apparatus (recording unit) in FIG. 1 has an imaging unit 201 that captures a subject as a moving image at a set frame rate (for example, 1 to 30 frames / second), and the captured moving image is a 4: 2: 2 YC. A 4: 2: 2 compression unit 202 that compresses the signal into a signal, a 0: 2: 2 compression unit 204 that compresses the captured moving image into a 0: 2: 2 YC signal, and a 4: 2: 2 YC signal The transmission unit 203 is configured to combine the 0: 2: 2 YC signal with a video signal of 60 frames / second and transmit it to the transmission line.

  The playback apparatus (playback unit) in FIG. 1 receives a reception unit 211 that receives a video signal of 60 frames / second from a transmission path, and expands the received video signal to a 4: 2: 2 YC signal. A decompressor 212; a 0: 2: 2 decompressor 214 that decompresses the received video signal to a 0: 2: 2 YC signal; a decompressed 4: 2: 2 YC signal and a 0: 2: 2 YC signal. Are combined with a 4: 4: 4 format RGB signal having a frame rate set to be the same as the frame rate set by the recording apparatus.

  The operation of the present embodiment will be described with reference to the flowchart shown in FIG. When imaging of a moving image is started in the recording unit, in processing 301, the imaging unit 201 converts a moving image captured at a set frame rate into an RGB signal in 4: 4: 4 format, and 4: 2: The data is transmitted to the 2 compression unit 202 and the 0: 2: 2 compression unit 204. In process 302, the 4: 2: 2 compression unit 202 and the 0: 2: 2 compression unit 204 compress the RGB signals into 4: 2: 2 YC signals and 0: 2: 2 YC signals, respectively. In processing 303, the transmission unit 203 combines the 4: 2: 2 YC signal and the 0: 2: 2 YC signal, and transmits the combined video signal to the transmission path as a 4: 2: 2 format video signal of 60 frames / second. (Processing 304).

  When the reproduction of the moving image is started in the reproduction unit, the reception unit 211 receives the video signal in processing 311. In process 312, the received video signal is decompressed by the 4: 2: 2 decompression unit 212 and the 0: 2: 2 decompression unit 214 into a 4: 2: 2 YC signal and a 0: 2: 2 YC signal, respectively. In processing 313, the combining unit 213 combines the 4: 2: 2 YC signal and the 0: 2: 2 YC signal into a 4: 4: 4 format RGB signal having a set frame rate. In process 314, an image is displayed from the display unit.

  The arrangement of the video signal by variable frame rate recording, the 4: 2: 2 YC signal, and the 0: 2: 2 YC signal in the transmission unit 203 will be described with reference to FIG. In the case of Over60P recording in which the imaging frame rate is 30 frames / second, which is half of 60 frames / second, and this is converted into a video signal with a frame rate of 60 frames / second, the conventional video signal has 60P frames. A 30P frame 402 is formed by recording 401 continuously in two frames. That is, in the conventional reproducing apparatus, a 30P video signal is obtained by reading out only the first frame of two consecutive frames. In the transmission unit 203 according to the present invention, a 4: 2: 2 YC signal conforming to the SMPTE 274M standard is arranged in the first frame 411 of consecutive frames, thereby enabling reproduction with a conventional reproduction apparatus. A 0: 2: 2 YC signal, which is a difference with respect to the 4: 2: 2 format, necessary for reproduction as a 4: 4: 4 RGB signal is arranged in the second frame 412 of consecutive frames (in the figure). A ′ and B ′ and C ′ as well).

  The coupling from the 4: 2: 2 and 0: 2: 2 YC signals to the 4: 4: 4 RGB signals in the coupling unit 213 will be described with reference to FIG. In the case of forming the 4: 4: 4 RGB signal 503 from the 4: 2: 2 YC signal 501, the Pb2 signal and the Pr2 signal in the 4: 2: 2 YC signal 501 are insufficient. Therefore, a 4: 4: 4 RGB signal of the original frame rate is formed by combining the Pb2 signal and the 0: 2: 2 YC signal 502 composed only of the Pr2 signal.

  By adding a 0: 2: 2 YC signal recording device to a conventional recording device, the recording device according to the present invention can record and reproduce RGB signals without requiring a large-capacity recording medium or conversion device. Therefore, it is useful as a moving image recording apparatus that records 4: 4: 4 RGB signals in a commercial moving image capturing system.

DESCRIPTION OF SYMBOLS 101 Imaging part 102 Data conversion part 103 Compression part 104 Transmission part 111 Reception part 112 Expansion part 113 Data conversion part 201 Imaging part 202 4: 2: 2 Compression part 203 Transmission part 204 0: 2: 2 Compression part 211 Reception part 212 4 : 2: 2 decompression unit 213 coupling unit 214 0: 2: 2 decompression unit 401 60P frame 402 30P frame 411 first frame of consecutive frames 412 second frame of consecutive frames 501 4: 2: 2 YC signal Configuration of 502 0: 2: 2 configuration of YC signal 503 Configuration of 4: 4: 4 RGB signal

Claims (2)

An image pickup unit that includes an image pickup device, picks up an image of a subject at a first frame rate by the image pickup device, and outputs an RGB signal in a 4: 4: 4 format;
A 4: 2: 2 compression unit for compressing the RGB signal into a YC signal in 4: 2: 2 format;
A 0: 2: 2 compression unit for compressing the RGB signal into a YC signal in a 0: 2: 2 format;
A video signal obtained by combining the YC signal in the 4: 2: 2 format and the YC signal in the 0: 2: 2 format with a second frame rate that is at least twice the first frame rate is transmitted to the transmission line. A transmitter to
A recording device having
A receiving unit that receives the video signal from a transmission path and divides the video signal into the 4: 2: 2 format YC signal and the 0: 2: 2 format YC signal;
A 4: 2: 2 decompression unit for decompressing the 4: 2: 2 format YC signal;
A 0: 2: 2 expansion unit for expanding the 0: 2: 2 format YC signal;
A combiner that combines the expanded 4: 2: 2 format YC signal and the expanded 0: 2: 2 format YC signal into a 4: 4: 4 format RGB signal at a first frame rate; A playback unit having
A recording device comprising:
A recording / reproducing system. In variable frame rate recording in which the first frame rate is 1 to 30P and the second frame rate is 60P, the 4: 2: 2 format YC signal and the 0: 2: 2 format YC signal are 2. The recording / reproducing system according to claim 1, wherein a video signal coupling means for coupling the video signal to the video signal is formed by a transmission unit.

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