Very low bit-rate video coding with block partitioning and adaptive selection of two time-differential frame memories

Fukuhara, T.; Asai, Kohtaro; Murakami, Tomonori

doi:10.1109/76.554432

Cited by 52 publications

(46 citation statements)

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“…Secondly, we modified the H.263+ codec to make use of one additional (long-term) frame buffer. This frame buffer was periodically updated according to an update parameter AE as in [9]. For both the single frame and dual frame cases, we measured the performance for integer and half-pel motion vectors.…”

Section: Half-pixel Accuracy Extension To the Rope Algorithmmentioning

confidence: 99%

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Video compression with intra/inter mode switching and a dual frame buffer

Leontaris

Cosman

Data Compression Conference, 2003. Proceedings. DCC 2003

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Video codecs that use motion compensation have recently achieved performance improvements from the use of intra/inter mode switching decisions within a ratedistortion framework. A separate development has involved the use of multiple frame prediction, in which more than one past reference frame is available for motion estimation. In this paper, we show that using a dual frame buffer (one short term frame and one long term frame available for prediction) together with intra/inter mode switching improves the compression performance of the coder. Also, we improve the mode switching algorithm with the use of half-pel motion vectors.

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Section: Half-pixel Accuracy Extension To the Rope Algorithmmentioning

confidence: 99%

“…In [9], only two time-differential frames were used, thus requiring a relatively modest increase in computational complexity. We refer to this as a dual frame buffer.…”

Section: Introductionmentioning

confidence: 99%

Video compression with intra/inter mode switching and a dual frame buffer

Leontaris

Cosman

Data Compression Conference, 2003. Proceedings. DCC 2003

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“…A 16×16-pixel block popularly known as macroblock (MB) requires 1 to 16 motion vectors depend on the type of blocks selected for ME &MC. Fukuhara et al [3] also proposed variable block ME and MC using rectangular and non-rectangular blocks. Main limitation of these approaches, if there is static background region in a MB, termed as intra-block temporal redundancy (ITR) (see in Figure 1), which has no motion and no residual error compared to the reference MB, still the H.264 or the approach in [3] requires some bits, which are significant especially at VLBR, to signal the decoder for zero motion vector and empty residual error.…”

Section: Introductionmentioning

confidence: 99%

Optimal arbitrary shaped pattern-based video coding

Paul

Murshed

2008

2008 IEEE 10th Workshop on Multimedia Signal Processing

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Abstract-Very low bit-rate video coding algorithms using content-based generated patterns to segment out moving regions at macroblock level have exhibited good potential for improved coding efficiency when embedded into the H.264 standard as extra mode. This content-based pattern generation (CPG) algorithm provides local optimal result as only one pattern can be optimally generated from a given set of moving regions. But, it failed to provide optimal results for multiple patterns from entire sets. Obviously, a global optimal solution for clustering the set and then generation of multiple patterns enhances the performance farther. But a global optimal solution is not achievable due to the non-polynomial nature of the clustering problem. In this paper, we proposed a near optimal contentbased pattern generation (OCPG) algorithm which outperforms the existing approach. Coupling OCPG, generating a set of patterns after clustering the macroblocks into several disjoint sets, with direct pattern selection algorithm by allowing all the macroblocks in multiple pattern modes outperforms the existing pattern-based coding while both embedded into the H.264.

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“…These switching coders might outperform the one using the H.261/H.263 coder alone, but the model-based coded image might be discarded due to the accumulation of modeling errors. Takahiro et al [12] proposed a block-partitioning method for improving the prediction efficiency. Based on four pre-defined patterns, a macroblock is divided into two parts in which motion estimation is performed separately.…”

Section: Introductionmentioning

confidence: 99%

An efficient low bit-rate video-coding algorithm focusing on moving regions

Wong

Lam

Siu³

2001

IEEE Trans. Circuits Syst. Video Technol.

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Abstract-Block-based motion estimation and compensation are the most popular techniques for video coding. However, as the shape and the structure of an object in a picture are arbitrary, the performance of such conventional block-based methods may not be satisfactory. In this paper, a very low bit-rate video coding algorithm that focuses on moving regions is proposed. The aim is to improve the coding performance, which gives better subjective and objective quality than that of the conventional coding methods at the same bit rate. Eight patterns are pre-defined to approximate the moving regions in a macroblock. The patterns are then used for motion estimation and compensation to reduce the prediction errors. Furthermore, in order to increase the compression performance, the residual errors of a macroblock are rearranged into a block with no significant increase of high-order DCT coefficients. As a result, both the prediction efficiency and the compression efficiency are improved.

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Very low bit-rate video coding with block partitioning and adaptive selection of two time-differential frame memories

Cited by 52 publications

References 1 publication

Video compression with intra/inter mode switching and a dual frame buffer

Video compression with intra/inter mode switching and a dual frame buffer

Optimal arbitrary shaped pattern-based video coding

An efficient low bit-rate video-coding algorithm focusing on moving regions

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