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Image processing device

一种图像处理装置、处理器的技术，应用在图像通信、彩色电视信号处理、电视等方向，能够解决增大电路规模等问题，达到加深理解的效果

Inactive Publication Date: 2009-11-25
SANYO ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the conventional technology requires two MPEG decoders, so there is a problem of increasing the circuit scale

Method used

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  • Image processing device
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] refer to figure 1 , the digital video camera 10 of this embodiment includes an optical lens 12 . The optical image of the scene to be photographed is irradiated on the imaging surface of the image sensor 14 through the optical lens 12 . The imaging surface generates electric charges corresponding to the optical image of the subject through photoelectric conversion, that is, the original image signal.

[0035]When the camera mode is selected by the mode key 46 a provided on the key input device 46 , the through image processing is performed, that is, the processing of displaying the real-time moving image of the object to be photographed on the LCD monitor 30 . The CPU 36 first instructs the driver 16 to repeatedly perform pre-exposure and thinning readout. Pre-exposure and sampling readout are performed in response to the vertical synchronization signal Vsync1 output from the frequency divider 34 according to the clock CLK1. The vertical synchronization signal Vsync1...

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Abstract

Each of a plurality of GOPs includes a plurality of frames of image data in which a start frame in a forward direction is subjected to intra-encoding and a frame successive to the start frame in the forward direction is subjected to inter-encoding. A CPU ( 36 ) designates the plurality of GOP blocks in a reverse direction. An MPEG 4 codec ( 38 ) decodes the plurality of frames of the image data included in the designated GOP in a forward direction, and a JPEG codec ( 40 ) performs intra-encoding on the plurality of frames of the decoded image data in the forward direction. The CPU ( 36 ) determines whether or not the number of frames on which the intra-encoding is performed is equal to or more than a threshold value. The JPEG codec ( 40 ) decodes in the reverse direction the plurality of frames of the image data on which intra-encoding is performed when the determination result by the CPU ( 36 ) is affirmative.

Description

technical field [0001] The present invention relates to an image processing device, and more particularly, to an image processing device that processes image data of a plurality of screens including, for example, an intra-encoded screen and an inter-encoded screen. Background technique [0002] One example of such a conventional device is disclosed in Japanese Unexamined Patent Publication No. 2003-52020 published on February 21, 2003. According to this prior art, when a reverse playback command is received, the B pictures and P pictures forming the MPEG video stream are decoded along the forward direction (first time axis direction), and the decoded image data is decoded along the reverse direction (second time axis direction). (time axis direction) is re-encoded into B pictures, and then a re-encoded data stream composed of I pictures constituting the MPEG video stream and the re-encoded B pictures is generated. The MPEG video decoder decodes the thus-generated re-encoded...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/93H04N5/92H04N5/225H04N7/36H04N5/76H04N5/77H04N5/907H04N9/79H04N9/804H04N9/806H04N19/00H04N19/102H04N19/159H04N19/177H04N19/196H04N19/40
CPCH04N5/772H04N9/8047H04N19/00187H04N7/2626H04N19/00284H04N7/2618H04N9/8042H04N19/00054H04N5/907H04N9/7921H04N19/15H04N19/114H04N19/177
Inventor 郭顺也
Owner SANYO ELECTRIC CO LTD
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