Transform Skip Mode Fast Decision Method for HEVC Encoding 


Vol. 39,  No. 4, pp. 172-179, Apr.  2014


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  Abstract

HEVC (High Efficiency Video Coding) fine-tuned many existing coding tools and adopted also many new coding techniques. As a result, HEVC has accomplished about 2 times of compression efficiency enhancement compared to the existing video coding standard of H.264/AVC. One of the newly adopted tools in HEVC is the transform skip scheme which performs quantization without transform. This technique improves coding efficiency especially with computer-generated images. However, the unavailability of global or local properties of general video signals demands encoder to decide whether performing transform or not for each TU (Transform Unit). The necessity of computing rate-distortion costs for this decision is one reason to increase encoder complexity. In this paper, a fast transform skip mode decision method is proposed, which is based on the fast decision of rate-distortion cost calculation for transform skip mode, by considering frequency characteristics of residual signal. The proposed method can reduce 4 ×4 TU encoding time by about 27.1% with only about 0.03% consequential decrement in BDBR.

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  Cite this article

[IEEE Style]

S. Yang, H. J. Shim, D. Lee, B. Jeon, "Transform Skip Mode Fast Decision Method for HEVC Encoding," The Journal of Korean Institute of Communications and Information Sciences, vol. 39, no. 4, pp. 172-179, 2014. DOI: .

[ACM Style]

Seungha Yang, Hiuk Jae Shim, Dahee Lee, and Byeungwoo Jeon. 2014. Transform Skip Mode Fast Decision Method for HEVC Encoding. The Journal of Korean Institute of Communications and Information Sciences, 39, 4, (2014), 172-179. DOI: .

[KICS Style]

Seungha Yang, Hiuk Jae Shim, Dahee Lee, Byeungwoo Jeon, "Transform Skip Mode Fast Decision Method for HEVC Encoding," The Journal of Korean Institute of Communications and Information Sciences, vol. 39, no. 4, pp. 172-179, 4. 2014.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880