Digital television transmitter and receiver for transmitting and receiving dual stream using 4 level vestigial side band robust data

A system for transmitting a digital signal, comprising:

• an input means for receiving a digital video data stream;
• a first encoding means for encoding robust data included in the digital video stream wherein the robust data are mapped to one of two groups {−5, −3, 1, 7} and {−7, −1, 3, 5} each grow having four levels;
• a second encoding means for encoding robust data such that the robust data are mapped to another group having four levels;
• a selecting means for enabling one of the first encoding means and the second encoding means to receive the robust data;
• and
• a VSB transmitting means for performing VSB modulation of the encoded signal to generate a VSB modulated signal and transmitting the VSB modulated signal.

A system for transmitting/receiving a digital signal, comprising:

• a transmitting apparatus for transmitting the digital signal;
• and
• a receiving apparatus for the digital signal,
• wherein the transmitting apparatus includes:
• an input means for receiving a digital video data stream;
• an encoding means for encoding robust data included in the digital video data stream such that the robust data are mapped to one of two groups {−5, −3, 1, 7} and {−7, −1, 3, 5} each group having four levels, to thereby generate an encoded signal;
• and
• a VSB transmitting means for performing VSB modulation of the encoded signal to generate a VSB modulated signal and transmitting the VSB modulated signal,
• wherein the receiving apparatus includes:
• a receiver for receiving and converting the VSB modulated signal into a baseband signal;
• an equalizer for deciding a level of the robust data based on the group which is used for encoding the robust data in the transmitting apparatus, to thereby generate an equalized signal;
• and
• a trellis decoding means for performing trellis decoding of the equalized signal based on the group which is used for encoding the robust data in the transmitting apparatus, to thereby generate a trellis decoded signal;
• and
• a decoding means for decoding the trellis decoded signal to restore the digital video data stream.

A system for transmitting/receiving a digital signal, comprising:

• a transmitting apparatus for transmitting the digital signal;
• and
• a receiving apparatus for the digital signal,
• wherein the transmitting apparatus includes:
• an input means for receiving a digital video data stream;
• a first encoding means for encoding robust data included in the digital video stream wherein the robust data are mapped to one of two groups {−5, −3, 1, 7} and {−7, −1, 3, 5} each group having four levels;
• a second encoding means for encoding robust data such that the robust data are mapped to another group having four levels;
• a selecting means for enabling one of the first encoding means and the second encoding means to receive the robust data;
• and
• a VSB transmitting means for performing VSB modulation of the encoded signal to generate a VSB modulated signal and transmitting the VSB modulated signal,
• wherein the receiving apparatus includes:
• a receiver for receiving and converting the VSB modulated signal into a baseband signal;
• an equalizer for deciding a level of the robust data based on the group which is used for encoding the robust data in the transmitting apparatus, to thereby generate an equalized signal;
• and
• a trellis decoding means for performing trellis decoding of the equalized signal based on the group which is used for encoding the robust data in the transmitting apparatus, to thereby generate a trellis decoded signal;
• and
• a decoding means for decoding the trellis decoded signal to restore the digital video data stream.

The system for receiving a digital signal, comprising:

• a receiver for receiving and converting a VSB modulated signal into a baseband signal;
• an equalizer for deciding a level of a robust data mapped to one of two groups {−5, −3, 1, 7} and {−7, −1, 3, 5}, based on the group which is used for encoding the robust data in a transmitting apparatus, to thereby generate an equalized signal;
• and
• a trellis decoding means for performing trellis decoding of the equalized signal based on the group which is used for encoding the robust data in the transmitting apparatus, to thereby generate a trellis decoded signal;
• and
• a decoding means for decoding the trellis decoded signal to restore the digital video data stream.

The system for receiving a digital signal, comprising:

• a receiver for receiving and converting a VSB modulated signal into a baseband signal;
• an equalizer for deciding a level of a robust data mapped to groups including two groups {−5, −3, 1, 7} and {−7, −1, 3, 5}, each group having four levels, based on the group which is used for encoding the robust data in a transmitting apparatus, to thereby generate an equalized signal;
• and
• a trellis decoding means for performing trellis decoding of the equalized signal based on the group which is used for encoding the robust data in the transmitting apparatus, to thereby generate a trellis decoded signal;
• and
• a decoding means for decoding the trellis decoded signal to restore the digital video data stream.

A method for transmitting a digital signal, comprising the steps of:

• a) receiving digital video data stream
• b) encoding robust data included in the digital video data stream such that the robust data are mapped to one of two groups {−5, −3, 1, 7} and {−7, −1, 3, 5} each group having four levels, to thereby generate an encoded signal;
• and
• c) performing VSB modulation of the encoded signal to generate a VSB modulated signal and transmitting the VSB modulated signal.

A method for transmitting/receiving a digital signal, comprising the steps of:

• transmitting a digital signal;
• and
• receiving the digital signal,
• wherein the step of transmitting a digital signal includes the steps of:
• a) receiving a digital video data stream;
• b) encoding robust data included in the digital video data stream such that the robust data are mapped to one of two groups {−5, −3, 1, 7} and {−7, −1, 3, 5} each group having four levels, to thereby generate an encoded signal;
• and
• c) performing VSB modulation of the encoded signal to generate a VSB modulated signal and transmitting the VSB modulated signal,
• wherein the step of receiving a digital signal includes the steps of:
• d) receiving and converting the VSB modulated signal into a baseband signal;
• e) deciding a level of the robust data based on the group which is used for encoding the robust data in the transmitting apparatus, to thereby generate an equalized signal;
• and
• f) performing trellis decoding of the equalized signal based on the group which is used for encoding the robust data in the transmitting apparatus, to thereby generate a trellis decoded signal;
• and
• g) decoding the trellis decoded signal to restore the digital video data stream.

A method for receiving a digital signal, comprising the steps of:

• a) receiving and converting a VSB modulated signal into a baseband signal;
• b) deciding a level of a robust data mapped to one of two groups {−5, −3, 1, 7} and {−7, −1, 3, 5}, based on the group which is used for encoding the robust data in a transmitting apparatus, to thereby generate an equalized signal;
• and
• c) performing trellis decoding of the equalized signal based on the group which is used for encoding the robust data in the transmitting apparatus, to thereby generate a trellis decoded signal;
• and
• d) decoding the trellis decoded signal to restore the digital video data stream.