Adaptive Interpolation-Based Divide-and-Predict Intra Coding for H.264/AVC

Abstract

A new intra-frame coding method based on H.264/AVC is proposed. In the proposed method, every other pixel is sampled either in a horizontal or vertical direction without any anti-aliasing filtering, and two subframes of the even-pixel and odd-pixel are then generated. The even-pixel subframe is coded as a conventional intra frame whereas the other is coded by utilizing the reconstructed information of the even-pixel subframe. The experimental results show that our proposed scheme outperforms the conventional intra-frame coding in H.264/AVC and reduces the bit rate by 11.67% on average at the baseline profile, and by 4.53% at the high profile of H.264/AVC.

Enhanced Intra Prediction Based on Adaptive Coding Order and Multiple Reference Sets in HEVC

“…In the results, Y denotes the luminance component, and U and V indicate the chrominance components. For evaluation of the coding performance, the proposed method, which consists of the adaptive coding order and the multiple reference sets, was compared to the sampling-based intra prediction method [11,12]. As the performance of these sampling-based prediction methods was reported on H.264/AVC, I implemented it on HEVC and re-optimized most of the parameters.…”

“…Table 5. Coding performance of (a) the sampling-based intra prediction method [11,12] and (b) the proposed method. Table 6 represents the detailed coding performance of the adaptive coding order.…”

“…In addition to the simple increase in the number of the angular directions, there have been several studies on efficient intra coding methods [6][7][8][9][10][11][12][13][14]. Intra prediction, in the method proposed in [6], is performed through template matching in reconstructed pixels.…”

“…It skips intra prediction mode bits when the correlation of the neighboring boundary pixels is strong. In [11], a sampling-based intra prediction method was introduced that divides an original image into two sub-images through horizontal or vertical sampling. One sub-image is first compressed, and then the other sub-image is predicted from the reconstructed sub-image.…”

Efficient H.264/AVC Video Coding with Adaptive Transforms

“…I N A video sequence, the frames contain both temporally and spatially redundant information. The temporal redundancy is usually removed by motion estimation (ME) and motion compensation (MC), while the spatial redundancy is removed by color space conversion [1], predictive coding [2]- [4] or transform coding [5]. The efficiency of transform coding is due to the fact that most of the block energy is compacted into only a few transform coefficients in the frequency domain.…”