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IEEE International Conference on Image Processing, Thessaloniki, Greece, October 2001. SECURE SCALABLE STREAMING ENABLING TRANSCODING WITHOUT DECRYPTION
 

Summary: IEEE International Conference on Image Processing, Thessaloniki, Greece, October 2001.
SECURE SCALABLE STREAMING ENABLING TRANSCODING WITHOUT DECRYPTION
Susie J. Wee and John G. Apostolopoulos
Streaming Media Systems Group
Hewlett-Packard Laboratories, Palo Alto, CA USA
ABSTRACT
We present a method of secure scalable streaming (SSS) that
enables low-complexity and high-quality transcoding to be per-
formed at intermediate, possibly untrusted, network nodes with-
out compromising the end-to-end security of the system. SSS
encodes video into secure scalable packets using jointly designed
scalable coding and progressive encryption techniques. This com-
bination allows downstream transcoders to perform transcoding
operations such as bitrate reduction and spatial downsampling by
simply truncating or discarding packets, and without decrypting
the data. Secure scalable packets have unencrypted headers that
can provide hints such as optimal truncation points to downstream
transcoders. Using these hints, downstream transcoders can per-
form RD-optimal transcoding for fine-grain bitrate reduction. The
SSS transcoding operation has low complexity and is stateless, so

  

Source: Apostolopoulos, John - Hewlett Packard Research Labs

 

Collections: Computer Technologies and Information Sciences