Image encoding and decoding apparatus, and image encoding and decoding method

Abstract

According to the present invention, an adaptive scheme is applied to an image encoding apparatus that includes an inter-predictor, an intra-predictor, a transformer, a quantizer, an inverse quantizer, and an inverse transformer, wherein input images are classified into two or more different categories, and two or more modules from among the inter-predictor, the intra-predictor, the transformer, the quantizer, and the inverse quantizer are implemented to perform respective operations in different schemes according to the category to which an input image belongs. Thus, the invention has the advantage of efficiently encoding an image without the loss of important information as compared to a conventional image encoding apparatus which adopts a packaged scheme.

Description

CLAIM FOR PRIORITY[0001]This application claims priority to Korean Patent Application Nos. 10-2012-0019663 filed on Feb. 27, 2012 and 10-2012-0106279 filed on Sep. 25, 2012 in the Korean Intellectual Property Office (KIPO), the entire contents of which are hereby incorporated by reference.BACKGROUND[0002]1. Technical Field[0003]Example embodiments of the present invention relate in general to the field of a video encoding / decoding apparatus and more specifically to an apparatus for classifying input images into two or more different categories according to preset attributes and encoding / decoding the images according to the categories of the input images.[0004]2. Related Art[0005]H.264 / advanced video coding (AVC) is a standard of a video coder and decoder (CODEC) having a highest compression rate among currently standardized CODECs. In order to improve compression efficiency, predictive encoding is performed on an image using intra-prediction considering directivity, an integer trans...

AI Technical Summary

Benefits of technology

[0028]Example embodiments of the present invention provide a video encoding / decoding apparatus and a video encoding / decoding method using an adaptive scheme in which the video encoding / decoding apparatus more efficiently encodes / decodes images by classifying input images into two or more different categories according to preset attributes and encoding / decoding the classified images in different schemes according to the categories of the input images.

[0047]According to the above-described example embodiments of the present invention, the video encoding / decoding apparatus to which an adaptive scheme is applied more efficiently encodes / decodes images by classifying input images into two or more different categories according to preset attributes and encoding / decoding the images in different schemes, thereby encoding / decoding the images more efficiently without loss of important information than the conventional technology to which the packaged scheme is applied.

Problems solved by technology

However, the conventional video encoding / decoding apparatus described above has a disadvantage in that motion prediction and compensation, transform and quantization, inverse transform and inverse quantization, and encoding or decoding operations to which given schemes are fixedly applied are performed on all input images.

The conventional video encoding / decoding apparatus has a problem in that the motion prediction and compensation, transform and quantization, inverse transform and inverse quantization, and encoding or decoding operations are performed on all input images including the two images in a packaged scheme.

However, there is still a limitation in this conventional technology which targets only a specific part or a very narrow part in all encoding / decoding processes on an image.

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