A transcoder design is proposed in which the transcoder loads the pre-encoded embedded wavelet coefficients and computes the DCT coefficients. The resulting DCT coefficients are quantized and sorted by multi-grid embedded (MGE) coding to output a compressed DCT bitstream. This transcoder has two operational modes: open-loop and closed-loop. The open-loop scheme is designed for direct transcoding, targeted to applications in which receivers are connected to the transcoder through a fast network and demand the same rate. In contrast, the closed-loop scheme is designed for fully progressive transcoding, targeted to receivers which are connected to the transcoder through a slow network connection, and may demand heterogeneous rates. The performance of the transcoder is evaluated in both open-loop mode and close-loop mode.
|Original language||English (US)|
|Number of pages||4|
|State||Published - Dec 1 2000|
|Event||International Conference on Image Processing (ICIP 2000) - Vancouver, BC, Canada|
Duration: Sep 10 2000 → Sep 13 2000
|Other||International Conference on Image Processing (ICIP 2000)|
|Period||9/10/00 → 9/13/00|