Patent ID: 7215714

Claim:
An apparatus comprising: an input arranged to provide a received signal having a frame structure in which a frame comprises a plurality of data segments and a frame synch segment; a first convolutional deinterleaver characterized by deinterleave parameters B( 1 ), M( 1 ) and N( 1 ), wherein the first convolutional deinterleaver is arranged to convolutionally deinterleave the received signal in accordance with the deinterleave parameters B( 1 ), M( 1 ) and N( 1 ) to produce a first deinterleaved signal, wherein the first convolutional deinterleaver comprises B( 1 ) paths, wherein M( 1 ) is a unit delay through a path, and wherein N( 1 )=M( 1 )B( 1 ); and, a second convolutional deinterleaver characterized by deinterleave parameters B( 2 ), M( 2 ) and N( 2 ), wherein the second convolutional deinterleaver is arranged to convolutionally deinterleave the first deinterleaved signal in accordance with the deinterleave parameters B( 2 ), M( 2 ) and N( 2 ) to produce a second deinterleaved signal, wherein the second convolutional deinterleaver comprises B( 2 ) paths, wherein M( 2 ) is a unit delay through a path, wherein N( 2 )=M( 2 )B( 2 ), and wherein each of the first and second convolutional deinterleavers is synchronized to the frame synch segment.