Methods and apparatuses for transmission and reception of information signals

An apparatus for transmitting an information signal, comprising:

• means for generating a plurality of data block signals on the basis of said information signal;
• means for generating a plurality of parity block signals on the basis of said plural data block signals;
• means for generating a frame signal including said plural data block signals and said parity block signals;
• and
• means for sending out said frame signal;
• wherein each of said data block signals includes a first block synchronizing signal indicating the start of the associated data block signal, a data signal containing said information signal and a first parity signal obtained by encoding said data signal;
• wherein each of said parity block signals includes a second block synchronizing signal indicating the start of the associated parity block signal, a second parity signal and a third parity signal;
• wherein bit signals located at same bit positions in said second parity signals, respectively, are obtained by encoding bit signals located at same bit positions in said data signals, respectively;
• wherein bit signals located at same bit positions in said third parity signals, respectively, are obtained by encoding bit signals located at same bit positions in said first parity signals, respectively, or wherein said third parity signal in each of said parity block signals is obtained by encoding said second parity signal in each of said parity block signals;
• and
• wherein said first block synchronizing signals differ from said second block synchronizing signals.

A method of receiving an information signal, comprising the steps of:

• receiving a sent signal as a received frame signal;
• wherein said frame signal includes a plurality of data block signals and a plurality of parity block signals;
• each of said data block signals including a first block synchronizing signal indicating the start of the associated data block signal, a data signal containing said information signal and a first parity signal obtained by encoding said data signal;
• each of said parity block signals including a second block synchronizing signal indicating the start of the associated parity block signal, a second parity signal and a third parity signal;
• bit signals located at same bit positions in said second parity signals, respectively, being obtained by encoding bit signals located at same bit positions in said data signals, respectively;
• bit signals located at same bit positions in said third parity signals, respectively, being obtained by encoding bit signals located at same bit positions in said first parity signals, respectively, or alternatively said third parity signal in each of said parity block signals being obtained by encoding said second parity signal in each of said parity block signals;
• detecting at least one of said first block synchronizing signals and said second block synchronizing signals from said received frame signal, said first block synchronizing signals being different from said second block synchronizing signals;
• establishing block synchronization for each of said data block signals and parity block signals based on the detected first or second block synchronizing signals and establishing frame synchronization by detecting a point of change in the detected block synchronizing signal from one of said first and second block synchronizing signals to the other;
• storing in storage means received data signals and first received parity signals corresponding, respectively, to said data signals and said first parity signals contained in the associated data block signals, respectively, as well as second received parity signals and third received parity signals corresponding, respectively, to said second parity signals and said third parity signals contained in the associated parity block signals, respectively, on the basis of said received frame signal in response to the detection of said at least one block synchronizing signal;
• and
• decoding received information signal corresponding to said information signal on the basis of the signals stored in said storage means and identifying the received signal on the basis of said decoded received information signal.

A method of receiving an information signal, comprising the steps of:

• receiving a sent signal as a received frame signal;
• wherein said frame signal includes a plurality of data block signals and a plurality of parity block signals;
• each of said data block signals including a first block synchronizing signal indicating the start of the associated data block signal, a data signal containing said information signal and a first parity signal obtained by encoding said data signal;
• each of said parity block signals including a second block synchronizing signal indicating the start of the associated parity block signal, a second parity signal and a third parity signal;
• bit signals located at same bit positions in said second parity signals, respectively, being obtained by encoding bit signals located at same bit positions in said data signals, respectively;
• bit signals located at same bit positions in said third parity signals, respectively, being obtained by encoding bit signals located at same bit positions in said first parity signals, respectively, or alternatively said third parity signal in each of said parity block signals being obtained by encoding said second parity signal in each of said parity block signals;
• detecting at least one of said first block synchronizing signals and said second block synchronizing signals from said received frame signal;
• storing in storage means received data signals and first received parity signals corresponding, respectively, to said data signals and said first parity signals contained in the associated data block signals, respectively, as well as second received parity signals and third received parity signals corresponding, respectively, to said second parity signals and said third parity signals contained in the associated parity block signals, respectively, on the basis of said received frame signal in response to the detection of said at least one block synchronizing signal;
• and
• decoding received information signal corresponding to said information signal on the basis of the signals stored in said storage means and identifying the received signal on the basis of said decoded received information signal;
• wherein said decoding and identifying step comprises the steps of:
• decoding said received data signal and said first received parity signal corresponding to each of said data block signals through a first error correction processing;
• decoding said received parity signal and said third received parity signal corresponding to each of said parity block signals through a second error correction processing,
• making a first decision as to whether any error not corrected exists in the received data signal or the first received parity signal which corresponds to each of said data block signals and which has been decoded through said first error correction processing, and
• identifying as a reception signal the received information signal which corresponds to said information signal and which are contained in each of the received data signals decoded through said first error correcting processing and decided not containing any error uncorrected;
• wherein said decoding and identifying step further comprises the steps of:
• decoding through a third error correcting processing the bit signals located at same positions in the received data signals decoded through the respective first error correction processings and corresponding to said frame signal and the bit signals located at same bit positions in the second received parity signals decoded through the respective second error correction processings and corresponding to said frame signal, when a decision is made that error remains uncorrected in any one of the received data signals or the first received parity signals which correspond to the data block signals contained in said frame signal and which have been decoded through said first error correcting processing,
• decoding through a fourth error correcting processing the bit signals located at same positions in the first received parity signals decoded through the respective first error correction processings and corresponding to said frame signal and the bit signals located at same bit positions in the third received parity signals decoded through the respective second error correcting processings and corresponding to said frame signal, when a decision is made that error remains uncorrected in any one of the received data signals or the first received parity signals which correspond to the data block signals contained in said frame signal and which have been decoded through the first error correcting processing,
• decoding through a fifth error correcting processing the signal of the received data signals decoded through said third error correcting processing and the first received parity signals decoded through said fourth error correcting processing and corresponding to the respective data block signals contained in said frame signal, wherein said signal undergoing said fifth error correcting processing corresponds to the received data and the first received parity signal decoded through said first error correcting processing and decided that uncorrected error exists,
• making a second decision as to whether or not error remains uncorrected in the received data signal which has been decoded through said fifth error correcting processing and which corresponds to each of said data block signals, and
• identifying as the reception signal the signal which corresponds to said information signal and which is contained in each of the data signals decoded through said fifth error correcting processing and decided as containing no uncorrected error.

An apparatus for receiving an information signal, comprising:

• means for receiving a sent signal as a received frame signal;
• wherein said frame signal includes a plurality of data block signals and a plurality of parity block signals;
• each of said data block signals including a first block synchronizing signal indicating the start of the associated data block signal, a data signal containing said information signal and a first parity signal obtained by encoding said data signal;
• each of said parity block signals including a second block synchronizing signal indicating the start of the associated parity block signal, a second parity signal and a third parity signal;
• bit signals located at same bit positions in said second parity signals, respectively, being obtained by encoding bit signals located at same bit positions in said data signals, respectively;
• bit signals located at same bit positions in said third parity signals, respectively, being obtained by encoding bit signals located at same bit positions in said first parity signals, respectively, or alternatively said third parity signal in each of said parity block signals being obtained by encoding said second parity signal in each of said parity block signals;
• means for detecting at least one of said first block synchronizing signals and said second block synchronizing signals from said received frame signal;
• means for storing in storage means received data signals and first received parity signals corresponding, respectively, to said data signals and said first parity signals contained in the associated data block signals, respectively, as well as second received parity signals and third received parity signals corresponding, respectively, to said second parity signals and said third parity signals contained in the associated parity block signals, respectively, on the basis of said received frame signal in response to the detection of said at least one block synchronizing signal;
• and
• decoding and identifying means for decoding received information signal corresponding to said information signal on the basis of the signals stored in said storage means and identifying the received signal on the basis of said decoded received information signal;
• wherein said first block synchronizing signals differ from said second block synchronizing signals.

An apparatus for receiving an information signal, comprising:

• means for receiving a sent signal as a received frame signal;
• wherein said frame signal includes a plurality of data block signals and a plurality of parity block signals;
• each of said data block signals including a first block synchronizing signal indicating the start of the associated data block signal, a data signal containing said information signal and a first parity signal obtained by encoding said data signal;
• each of said parity block signals including a second block synchronizing signal indicating the start of the associated parity block signal, a second parity signal and a third parity signal;
• bit signals located at same bit positions in said second parity signals, respectively, being obtained by encoding bit signals located at same bit positions in said data signals, respectively;
• bit signals located at same bit positions in said third parity signals, respectively, being obtained by encoding bit signals located at same bit positions in said first parity signals, respectively, or alternatively said third parity signal in each of said parity block signals being obtained by encoding said second parity signal in each of said parity block signals;
• means for detecting at least one of said first block synchronizing signals and said second block synchronizing signals from said received frame signal;
• means for storing in storage means received data signals and first received parity signals corresponding, respectively, to said data signals and said first parity signals contained in the associated data block signals, respectively, as well as second received parity signals and third received parity signals corresponding, respectively, to said second parity signals and said third parity signals contained in the associated parity block signals, respectively, on the basis of said received frame signal in response to the detection of said at least one block synchronizing signal;
• and
• decoding and identifying means for decoding received information signal corresponding to said information signal on the basis of the signals stored in said storage means and identifying the received signal on the basis of said decoded received information signal;
• wherein said decoding and identifying means comprises:
• means for decoding said received data signal and said first received parity signal corresponding to each of said data block signals through a first error correcting processing,
• means for decoding said received parity signal and said third received parity signal corresponding to each of said parity block signals through a second error correcting processing,
• first decision means for making a decision as to whether any error not corrected exists in the received data signal or the first received parity signal which corresponds to each of said data block signals and which has been decoded through said first error correcting processing, and
• means for identifying as a reception signal the received information signal which corresponds to said information signal and which are contained in each of the received data signals decoded through said first error correcting processing and decided not containing any error uncorrected;
• wherein said decoding and identifying means further comprises:
• means for decoding through a third error correcting processing the bit signals located at same positions in the received data signals decoded through the respective first error correction processings and corresponding to said frame signal and the bit signals located at same bit positions in the second received parity signals decoded through the respective second error correction processings and corresponding to said frame signal, when a decision is made that error remains uncorrected in any one of the received data signals or the first received parity signals which correspond to the data block signals contained in said frame signal and which have been decoded through said first error correcting processing,
• means for decoding through a fourth error correcting processing the bit signals located at same positions in the first received parity signals decoded through the respective first error correction processings and corresponding to said frame signal and the bit signals located at same bit positions in the third received parity signals decoded through the respective second error correcting processings and corresponding to said frame signal, when a decision is made that error remains uncorrected in any one of the received data signals or the first received parity signals which correspond to the data block signals contained in said frame signal and which have been decoded through the first error correcting processing,
• means for decoding through a fifth error correcting processing the signal of the received data signals decoded through said third error correcting processing and the first received parity signals decoded through said fourth error correcting processing and corresponding to the respective data block signals contained in said frame signal, wherein said signal undergoing said fifth error correcting processing corresponds to the received data and the first received parity signal decoded through said first error correcting processing and decided that uncorrected error exists,
• second decision means for making a decision as to whether or not error remains uncorrected in the received data signal which has been decoded through said fifth error correcting processing and which corresponds to each of said data block signals, and
• means for identifying as the reception signal the signal which corresponds to said information signal and which is contained in each of the data signals decoded through said fifth error correcting processing and decided as containing no uncorrected error.