An embedded error protection scheme for JPEG2000 compressed images and its assessment over CDMA environment

摘要

This paper proposes a robust error protection scheme for JPEG2000 part 1 codestream. The error protection is achieved by combining the layer structure of the codestream, a data embedding technique and an FEC code. At encoding stage, multiple quality layers of the codestream are FEC coded with various strengths. The resulting parity data is then embedded in the rearmost part of the codestream. Prior to image decoding, error recovery is done by means of extracting the embedded data and performing the FEC decoding to the corresponding layers. The proposed method offers several features: it provides backward compatibility with the JPEG2000 part 1 decoder, does not require additional bandwidth and can be integrated with the existing JPEG2000 error resilience tools. Hence, the method satisfies one of the requirements for the upcoming wireless JPEG2000 (JPWL or part 11 of JPEG2000 standard). We confirmed the proposal's effectiveness by simulations in a CDMA environment.