Transcoder with arbitrarily resizing capability

Abstract

This paper presents a transcoding technique that possesses the capability of arbitrarily resizing. Arbitrarily resizing is necessary when the resolution of an end display device differs from that of the video being pre-encoded. It is also a good strategy to achieve better visual quality when the transmission bandwidth is limited. The two key steps for a superior transcoding are the resizing and the coding steps. The resizing is achieved through an upsampling-filtering-downsampling process. Several motion vector reuse strategies that the specially tailored for the transcoder with arbitrarily resizing capability are presented. Experimental results confirm that the resizing can yield better visual quality.