Coding for Interactive Navigation in High‐Dimensional Media Data

Cheung, Ngai-Man; Cheung, Gene

doi:10.1002/9781118583593.ch9

Cited by 1 publication

(1 citation statement)

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“…One of the primary applications of our proposed merge frame is interactive media systems, which have attracted considerable interest [13]. In particular, a range of media data types have been considered for interactive applications in the past: images [14], light-fields [15,16], volumetric images [17], videos [5,6,[18][19][20][21][22] and high-resolution videos [23][24][25][26].…”

Section: Related Workmentioning

confidence: 99%

Merge Frame Design for Video Stream Switching Using Piecewise Constant Functions

Dai

Cheung

et al. 2016

IEEE Trans. on Image Process.

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Abstract-The ability to efficiently switch from one preencoded video stream to another (e.g., for bitrate adaptation or view switching) is important for many interactive streaming applications. Recently, stream-switching mechanisms based on distributed source coding (DSC) have been proposed. In order to reduce the overall transmission rate, these approaches provide a "merge" mechanism, where information is sent to the decoder such that the exact same frame can be reconstructed given that any one of a known set of side information (SI) frames is available at the decoder (e.g., each SI frame may correspond to a different stream from which we are switching). However, the use of bitplane coding and channel coding in many DSC approaches leads to complex coding and decoding. In this paper, we propose an alternative approach for merging multiple SI frames, using a piecewise constant (PWC) function as the merge operator. In our approach, for each block to be reconstructed, a series of parameters of these PWC merge functions are transmitted in order to guarantee identical reconstruction given the known side information blocks. We consider two different scenarios. In the first case, a target frame is first given, and then merge parameters are chosen so that this frame can be reconstructed exactly at the decoder. In contrast, in the second scenario, the reconstructed frame and merge parameters are jointly optimized to meet a rate-distortion criteria. Experiments show that for both scenarios, our proposed merge techniques can outperform both a recent approach based on DSC and the SP-frame approach in H.264, in terms of compression efficiency and decoder complexity.

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