High efficiency coding signal processing apparatus with error propagation influence reduction

A high efficiency coding signal processing apparatus comprising:

• data compressing means for frequency transforming data which represents a frame of information and outputting transform coefficients, indicative thereof, the transform coefficients including low-frequency components and high-frequency components, the data comprising a predetermined number of blocks, each block comprising a predetermined number of pixels;
• low-frequency component coding means for receiving the low-frequency components of the transform coefficients outputted by the data compressing means, and for outputting low-frequency data by encoding the low-frequency components;
• high-frequency component coding means for receiving the high-frequency components of the transform coefficients outputted by the data compressing means, and for outputting high-frequency data by encoding the high-frequency components;
• first transmission sequence packet means for receiving the low-frequency data outputted by the low-frequency component coding means, for performing predetermined sequencing with respect to the low-frequency data at a first predetermined period including at least two blocks thereof, and for outputting sequenced low-frequency data;
• second transmission sequence packet means for receiving the high-frequency data outputted by the high-frequency component coding means, for performing predetermined sequencing with respect to the high-frequency data at a second predetermined period so that block numbers of the high-frequency data correspond to block numbers of the low-frequency data sequenced by said first transmission sequence packet means, and for outputting sequenced high frequency data;
• and
• transmitting means for separately transmitting the sequenced low-frequency data output by the first transmission sequence packet means and the sequenced high-frequency data output by the second transmission sequence packet means, so as to arrange all of the sequenced high-frequency data after all of the sequenced low-frequency data, thereby permitting the data to be determined based on the sequenced low-frequency data, even if an error occurs within the sequenced high-frequency data.