Image compression apparatus

Abstract

The present invention relates to an image compression device. A first digital signal processor of the device reads the real time image of I frame encoding type in the image memory and the intermediate result image of P frame encoding type though a programmable logic array, performs conversion, quantization and coding to the corresponding frame image data, and then performing an inverse quantization inverse transform to reconstruct the image to store in the image memory; the first digital signal processor outputs the code stream data generated after encoding through a communication interface; a second digital signal reads the real time image and the reconstruction image through the programmable logic array, takes the reconstruction image as a reference image, performs movement estimation and movement compensation according to the real-time image and the reference image to generate intermediate results image, and then storing the intermediate results image in the image memory. The invention can perform real-time processing to the image sequence picked up by a high frame frequency and large surface array digital pick-up camera while guaranteeing the compressing quality. The present invention has simple structure, small size, and is principally used in remote transmission of images.

Description

technical field [0001] The invention relates to an image compression device. Background technique [0002] A currently used image compression device includes an image memory, a programmable logic array, and a digital signal processor; the image memory includes a real-time image storage area, a reference image storage area, and a reconstructed image storage area; the image data from the camera is sent to the To the programmable logic array, the programmable logic array stores the image data in the image memory; the digital signal processor reads the real-time image and reference image in the image memory through the programmable logic array, and performs motion prediction and motion based on the real-time image and reference image Compensate to generate an intermediate result image, transform, quantize and encode the intermediate result image, and output the code stream data generated by encoding through the communication interface; and the digital signal processor performs i...

AI Technical Summary

Problems solved by technology

However, the current image compression device only uses a digital signal processor to compress images in real time. Due to the limitation of speed and memory, it cannot process such a large amount of data in real time while ensuring the compression quality.

Generally, the collected image is divided into several parts, and each part of the image is compressed separately, which is difficult to ensure the quality of image compression.

Images