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Coding and Processing of High-Defini...

Han, Qinglong.

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Coding and Processing of High-Definition Video Signal.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Coding and Processing of High-Definition Video Signal./
作者:	Han, Qinglong.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2016,
面頁冊數:	168 p.
附註:	Source: Dissertation Abstracts International, Volume: 78-05(E), Section: B.
Contained By:	Dissertation Abstracts International78-05B(E).
標題:	Computer engineering. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10297262
ISBN:	9781369409673

Coding and Processing of High-Definition Video Signal.
Han, Qinglong.

Coding and Processing of High-Definition Video Signal. - Ann Arbor : ProQuest Dissertations & Theses, 2016 - 168 p.

Source: Dissertation Abstracts International, Volume: 78-05(E), Section: B.

Thesis (Ph.D.)--The Chinese University of Hong Kong (Hong Kong), 2016.

Nowadays, due to the advances in digital consumer technology and the growing availability of fast and reliable internet connections, High-Definition (HD) videos become more and more popular with many applications. In this thesis, the properties of HD videos are analysed and the efficient coding and processing techniques for hybrid video coding are proposed.

ISBN: 9781369409673Subjects--Topical Terms:

621879
Computer engineering.

Coding and Processing of High-Definition Video Signal.
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245 1 0 $a Coding and Processing of High-Definition Video Signal.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2016
300 $a 168 p.
500 $a Source: Dissertation Abstracts International, Volume: 78-05(E), Section: B.
500 $a Adviser: Wai-Kuen Cham.
502 $a Thesis (Ph.D.)--The Chinese University of Hong Kong (Hong Kong), 2016.
520 $a Nowadays, due to the advances in digital consumer technology and the growing availability of fast and reliable internet connections, High-Definition (HD) videos become more and more popular with many applications. In this thesis, the properties of HD videos are analysed and the efficient coding and processing techniques for hybrid video coding are proposed.
520 $a The spatial correlation of the HD videos is higher than that of the lower resolution ones. larger area is used to represent certain content or object in the HD videos. The higher order Integer Cosine Transforms (ICTs) can decorrelate the highly correlated signal more efficiently. Therefore, as the video definition keeps increasing, the demand for higher order ICTs is growing rapidly. In this thesis, a method, namely Recursive Integer Cosine Transform (RICT), to derive the order-2N ICTs is presented. Here, N can be any positive integer. RICT has orthogonal basis vectors and inherits the recursive structure from DCT such that the order-2 N transform can be derived from the order-2( N-1) transform. Therefore, RICT can be extended to higher orders easily. It also has high flexibility for implementation. Fully factorized structure can benefit the hardware design while matrix multiplication can guarantee an efficient SIMD implementation. The proposed transforms of order-4 to order-32 are implemented in the reference software of HEVC and AVS2. In both test conditions, RICT can achieve almost the same rate-distortion (R-D) performance as the original core transforms, while the number of computational operations can be efficiently reduced.
520 $a In both the H.264/AVC and HEVC, quantization is directly applied to transform coefficients which leads to the degradation of the objective video quality and annoying artifacts such as the blocking and ringing artifacts. To suppress the noise and artifacts, loop filters are designed and implemented at both the encoder and decoder. In this thesis, quantization noise is first analysed in detail. Based on the analysis, a newly designed loop filter is proposed. Non-local block similarity of the video signal is explored in the proposed method. Both the spatial and temporal adaptivity can be guaranteed in the implementation. Experimental results prove the efficiency of the proposed loop filter. Both subjective and objective quality of the reconstructed video can be improved when compared with the state-of-the-art methods.
520 $a The same method can also be implemented as a postprocessing filter which locates outside the video coding loop. The advantage of the loop filter is that the filtered frames with better quality can be referred as prediction frames. However, postprocessing filter is beneficial in the sense that it operates on the display buffer outside the coding loop and so decoders can choose whether or not to apply it based on the available computational resources. Moreover, the audience can choose to filter one specific frame to acquire its detailed information. Therefore, the postprocessing filter can provide more flexibility at the decoder side. Additional control information generated by the postprocessing filter can be entropy coded and transmitted to the decoder. Thus the performance and adaptivity of the postprocessing filter can be ensured. In this thesis, the theoretical analysis, implementation detail and experimental results of the postprocessing technique are demonstrated.
590 $a School code: 1307.
650 4 $a Computer engineering. $3 621879
650 4 $a Electrical engineering. $3 649834
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710 2 $a The Chinese University of Hong Kong (Hong Kong). $b Electronic Engineering. $3 2094192
773 0 $t Dissertation Abstracts International $g 78-05B(E).
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791 $a Ph.D.
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793 $a English
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