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Image-library-based video and image coding and decoding method and system

A codec and image library technology, applied in the field of multimedia processing, can solve the problem of low codec compression rate and achieve high compression rate, less data volume, and fast transmission or reception

Active Publication Date: 2011-11-09
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI +1
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Problems solved by technology

[0003] In traditional codec schemes, in order to increase the transmission rate and reduce the amount of transmitted data, lossy compression modes are often used to encode and decode data, but in order to maintain a certain image quality, the compression rate of the codec is not high

Method used

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  • Image-library-based video and image coding and decoding method and system
  • Image-library-based video and image coding and decoding method and system
  • Image-library-based video and image coding and decoding method and system

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Embodiment Construction

[0046] figure 1 The method for encoding and decoding video and images based on an image library in an embodiment is shown, including the following steps:

[0047] Step S110, comparing the multimedia data with the pre-stored data in the encoding database to obtain the difference data and the same data between the multimedia data and the pre-stored data.

[0048] In this embodiment, data such as various types of characters, objects, animations, and fragments are collected in advance in the encoding database, and a large amount of rich picture or image data is obtained and stored in the encoding database.

[0049] Comparing the multimedia data with the pre-stored data in the encoding database one by one to obtain the difference data and the same data in the multimedia data that are different from the pre-stored data. The multimedia data may be image data or video data.

[0050] In a specific example, such as figure 2 As shown, the specific process of step S110 is:

[0051] S...

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Abstract

The invention discloses an image-library-based video and image coding and decoding method, which comprises the following steps of: comparing multimedia data with pre-stored data in a coding database to obtain data, different from and identical with the pre-stored data, in the multimedia data; acquiring the attribute information of the identical data from the coding database; coding the different data and the attribute information of the identical data to obtain a data stream; and transmitting the data stream. In the method and a system, the multimedia data is compared with the pre-stored datato obtain the data, different from and identical with the pre-stored data, in the multimedia data, the different data and the attribute information of the identical data is coded, and the coding is not required by the whole multimedia data and only by the different data and the attribute information; and for the integral multimedia data, the different data forms a small part and the identical data forms the majority, and the coding of the identical data is performed for the attribute information of the identical data, so the volume of coded data is small, and a compression ratio is higher.

Description

【Technical field】 [0001] The invention relates to the field of multimedia processing, in particular to a video and image coding and decoding method and system based on an image library. 【Background technique】 [0002] Codec refers to a program or device that can compress or decompress images and videos. There are various encoding and decoding methods, mainly divided into object-based encoding and decoding methods and knowledge-based encoding and decoding methods. For the object-based codec method, the object in the image or video is usually recognized and encoded as an object; the knowledge-based codec method uses some common sense to enhance the recognition ability of the object in the image or video. [0003] In traditional codec schemes, in order to increase the transmission rate and reduce the amount of transmitted data, lossy compression modes are often used to encode and decode data, but in order to maintain a certain image quality, the compression rate of the codec i...

Claims

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Application Information

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IPC IPC(8): H04N7/26H04N19/20
Inventor 朱定局李朝晖
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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