US 6,650,638 B1 · Decoding method and decoder for 64b/66b coded packetized serial data

Abstract

The frame of data that is decoded is one of a set of frames that represent a packet of information words, and that additionally represent coded control words preceding and following the packet. The frames each include a master transition and a payload field. The payload field either is composed exclusively of ones of the information words, or includes a TYPE word that defines the structure of the payload field. The master transition is in a first state when the payload field is composed exclusively of ones of the information words, and is otherwise in a second state. In the method, a determination is made of whether the master transition is in the first state. When the master transition is in the first state, the payload field is adopted as a block of received data. When the master transition is not in the first state, the TYPE word is extracted from the payload field, the payload field is expanded in response to the TYPE word, and the payload field, after expansion, is adopted as a block of received data.

Claims18

Dependent claims

A method of decoding a frame of data, the frame being one of a set of frames that represent a packet of information words and that additionally represent coded control words preceding and following the packet, the frames each including a master transition and a payload field, the payload field being one of (a) composed exclusively of ones of the information words, and (b) including a TYPE word that identifies a structure of the payload field, the master transition being in a first state when the payload field is composed exclusively of ones of the information words, and otherwise being in a second state, the method comprising:

determining when the master transition is in the first state;
when the master transition is in the first state, adopting the payload field as a block of received data;
and
when the master transition is not in the first state:
extracting the TYPE word from the payload field,
expanding the payload field in response to the TYPE word, and
adopting the payload field after expansion as a block of received data.

4 more elements

A decoder for decoding a frame of data, the frame being one of a set of frames that represent a packet of information words and that additionally represent coded control words preceding and following the packet, the frames each including a master transition and a payload field, the payload field being one of (a) composed exclusively of ones of the information words, and (b) including a TYPE word that identifies a structure of the payload field, the master transition being in a first state when the payload field is composed exclusively of ones of the information words, and otherwise being in a second state, the decoder comprising:

a frame decoder that receives the frame and separates the frame into the master transition and the payload field;
a type word extractor connected to receive the payload field and the master transition from the frame decoder and operating only when the master transition is in the second state to extract the TYPE word from the payload field;
and
a block generator connected to receive the payload field, the TYPE word and the master transition, the block generator operating:
when the master transition is in the first state, to adopt the payload field as a block of received data, and
when the master transition is in the second state, to expand the payload field in response to the TYPE word and to adopt the payload field after expansion as the block of received data.

3 more elements

Dependencies are inferred from the claim text.

Decoding method and decoder for 64b/66b coded packetized serial data

Life of this patent

Decoding method and decoder for 64b/66b coded packetized serial data

Life of this patent

Abstract

Claims18