US 6,557,110 B2 · Channel-to-channel skew compensation apparatus

Abstract

A channel-to-channel skew compensation apparatus is provided with N number of frame synchronization circuits 11 for generating frame signals to indicate data position of parallel data on a common time axis for each data transmission channel; a reference timing determination circuit 16 for determining a reference timing based on N frame signals output from the frame synchronization circuit 11; a skewing amount detection section 15 for generating N skewing amount signals according to the reference timing determined by the reference timing determination circuit 16; and a timing compensation section 13 for adjusting output timing of parallel data for each transmission channel according to the skewing amount signal generated by the skewing amount detection section 15.

Claims12

Dependent claims

A channel-to-channel skew compensation apparatus comprising:

an N number of frame synchronization circuits, provided for each transmission channel used, receiving parallel input data comprised by N parallel bits of not less than two bits located at identical bit-positions arranged on a common time axis, transmitted in parallel over N transmission channels, and generating frame signals to indicate positions of said parallel data on said common time axis for each operative transmission channel;
a reference timing determination circuit for deciding a reference timing according to N pieces of frame signals output from said frame synchronization circuits;
a skewing amount detection section for generating N pieces of skewing amount signals according to said reference timing determined by said reference timing determination circuit;
and
a timing compensation circuit provided in each transmission channel for adjusting output timing of said parallel data for individual transmission channels according to skewing amount signals generated by said skewing amount detection section.

2 more elements

A channel-to-channel skew compensation apparatus receiving parallel input data that are pre-encoded for error correction, obtained by transmitting in parallel a plurality of bits, located at identical positions on a common time axis, over a plurality of transmission channels, and compensating channel-to-channel positional shifts in said parallel input data on said common time axis, comprising:

a frame position detection section in each transmission channel for detecting frame positions on a common time axis of said parallel input data;
a channel-to-channel skew compensation section for adjusting channel-to-channel positional shifts in said parallel data on said common time axis, based on frame positions in not less than two transmission channels on said common time axis detected by said frame position detection section;
an error correction section receiving parallel data that are error correction encoded for channel-to-channel positional shifts on said common time axis, and decoding error corrections provided for said parallel data, and generating an error signal to indicate that there is or there is no error in each transmission channel;
and
an error control section for controlling a detection state of said frame position detection section according to error signals output by said error correction section.

2 more elements

Dependencies are inferred from the claim text.

Channel-to-channel skew compensation apparatus

Life of this patent

Channel-to-channel skew compensation apparatus

Life of this patent

Abstract

Claims12