<title>Adaptive 3D subband video coding</title>

Abstract

In this paper, we propose a temporally adaptive three-dimensional subband coding (3D SBC) technique to effectively exploit the temporal activities in the input video. By using the rate-distortion performance measure, we show the optimal number of temporal subbands can be easily determined. The base temporal subband, which yields mich concentrated energy, is encoded using H.261-like motion compensated discrete cosine transform technique. While in the higher temporal subbands, the two-dimensional adaptive wavelet packet bases are employed to exploit the various energy distributions, due to the moving components. In encoding the subbands, we employ adaptive scanning methods, followed by uniform step-size quantization with variable length coding, and coded/not-coded flag reduction technique based the quadtree structure. From the simulation results, the proposed 3D SBC provides about 0.29 3.14 dB PSNR gain over the H.261 and the temporally fixed 3D SBC techniques.

Three-dimensional video compression using subband/wavelet transform with lower buffering requirements

“…The multirate scheme uses global camera-pan compensation and supports multiple-resolution decoder displays. In [2], an adaptive scheme in which the decomposition along the temporal direction utilizes more or less frames depending on video activity. Typically, less frames would be used when activity is high (correlation is low).…”