Reduced memory requirements in modified JPEG2000 codec

In JPEG2000, the wavelet transformed image is subdivided into equally sized data blocks, which are independently entropy coded. It is therefore often strongly suggested that these blocks can be decoded on the instant of their creation at the encoder, making temporary memory quasi obsolete. Unfortunately, data dependencies in the forward and inverse wavelet transform prevent their complete, instantaneous creation (consumption) at the encoder (decoder), resulting in their partial, temporary storage and thus also in increased memory needs. This paper shows that the main burden is the unique, large data block size, which is used over all levels of the wavelet image. Relaxing this constraint substantially diminishes the memory needs over the full JPEG2000 codec chain.