Patent ID: 7349467

Claim:
A data demodulation apparatus for receiving data of an arbitrary one of a plurality of data rates and demodulating the receive data making use of blind transport format detection, comprising: Viterbi decoding means for successively Viterbi decoding the receive data beginning with the top bit; end bit position discrimination data extraction means for successively extracting end bit position discrimination data which are obtained at end bit positions of the data rates when the receive data are successively Viterbi decoded beginning with the top bit by said Viterbi decoding means; and data rate discrimination means for discriminating the data rate of the receive data based on the end bit position discrimination data successively extracted by said end bit position discrimination data extraction means; wherein the data rate discrimination means discriminates whether or not the receive data M to M+r−1 (where M and R are integers) include receive data which is end bit position (EBP) data.