Extension of JPEG XS for Two-Layer Lossless Coding
This work addresses a specific limitation in image coding standards for applications requiring both low latency and lossless compression, but it is incremental as it builds on existing JPEG XT concepts.
The authors tackled the lack of lossless coding support in JPEG XS by proposing a two-layer method that combines JPEG XS with a lossless coding technique, enabling lossless restoration of original images while maintaining compatibility with JPEG XS.
A two-layer lossless image coding method compatible with JPEG XS is proposed. JPEG XS is a new international standard for still image coding that has the characteristics of very low latency and very low complexity. However, it does not support lossless coding, although it can achieve visual lossless coding. The proposed method has a two-layer structure similar to JPEG XT, which consists of JPEG XS coding and a lossless coding method. As a result, it enables us to losslessly restore original images, while maintaining compatibility with JPEG XS.