Method and apparatus for bus encoding and decoding

An apparatus for bus decoding, comprising:

• a discontinuous pattern decoder, with a built-in DPT to store indices and data in pairs;
• a consecutive pattern decoder, coupled to a bus, for decoding an input from the bus through a consecutive data decoding method, and then outputting the decoded data;
• and
• a data receiver, coupled to the discontinuous pattern decoder, the consecutive pattern decoder, the bus, and a control line.

A method for bus encoding, comprising:

• (a) providing a DPT to store indices and data in pairs;
• (b) if the DPT contains an index the same as a previous data, outputting the data corresponding to the previous data;
• (c) encoding a current data through a consecutive data encoding method, and outputting a result of the encoding;
• and
• (d) if the current data is equal to the output data in Step (b), asserting a control line and freezing a bus;
• otherwise, de-asserting the control line and outputting the encoding result in Step (c) to the bus.

A method for bus decoding, comprising:

• (a) providing a DPT to store indices and data in pairs;
• (b) if the DPT contains an index the same as a previous data, outputting the data corresponding to the previous data;
• (c) decoding an input from a bus through a consecutive data decoding method, and outputting the decoded data;
• and
• (d) if a control line is in an asserted status, outputting the output data in Step (b) as a current data;
• otherwise, outputting the output data in Step (c) as the current data.