Patent ID: 7139318

Claim:
Receiving apparatus wherein a transport channel bit-stream (TCBS), which contains a first digitized television IF signal represented by transport samples composed of at least a N−C-bits compressed transport sample (CTS) and a (M−N)-bits residual transport sample (RTS) and which is either obtained through compression or is transmitted, is transformed into a second digitized television IF signal, comprising: an input for the transport channel bit-stream (TCBS), a decoder DPCM-core (D 2 ) for decompressing the N−C bits of a compressed transport sample (CTS) to N MSB's of an output sample (S 2 ), a combiner (CB) for combining the M−N LSB's and N MSB's of a sample to an output sample (S 2 ), a second location clipping detector (BSC 2 ) which generates a second location PCM-bit substitution control signal (SC 2 ), indicating what is to be selected as M−N least significant bits of the output sample (S 2 ), and a sign signal (SGN), being the sign bit of a transmitted transformed clipping error, a second location substitutor (BS 2 ) which switches between the received M−N LSB's from the residual transport sample (RTS) and a replacement according to the second location PCM-bit substitution control signal (SC 2 ), and an MSB corrector (COR) which adds to or subtracts from the result of adder ADD 21 in the decoder DPCM-core (D 2 ) and the output value of mapping the received transport sample (RTS) by means of a second function, according to the second location PCM-bit substitution control signal (SC 2 ) and the sign signal (SGN).