Apparatus in digital video tape recorder for detecting a sync signal in digital data

An apparatus for a digital video tape device for detecting a sync signal in digital data, comprising:

• data restoring means for producing serial data and a serial clock signal received from a reproducing head of the digital video tape device;
• servo means for producing a head switching pulse and a super-video home system (S-VHS)/video home system (VHS) discriminating signal;
• identification detecting means for producing a signal indicative of an end of reading one segment of tracks;
• and
• sync signal detecting means, responsive to the serial data, the serial clock signal, the head switching pulse, the S-VHS/VHS discriminating signal, and the signal indicative of the end of the reading of one segment of tracks, for determining correspondence in sync patterns even in a case where not all corresponding bits coincide with one another, for removing erroneously detected sync patterns using a window situated around a position at which a sync signal is produced, for detecting a signal, wherein the sync signal detecting means includes:
• means for generating a signal indicating a reading of an initial portion of a track of recorded information in response to the head switching pulse, the S-VHS/VHS discriminating signal, and a first clock signal,
• clock converting means for producing first and second clock signals by using the serial clock signal and a matched block sync signal,
• means for generating and outputting the matched block sync signal to the clock converting means by using the serial data, the serial clock signal, and the first clock signal, and for detecting a block sync signal, and
• data aligning means for producing final data in response to a sync pattern by using the serial clock signal and the first and second clock signals.

An apparatus for a digital video tape device for detecting a sync signal in digital data, comprising:

• data restoring means for producing serial data and a serial clock signal received from a reproducing head of the digital video tape device;
• servo means for producing a head switching pulse and a super-video home system (S-VHS)/video home system (VHS) discriminating signal;
• identification detecting means for producing a signal indicative of an end of reading one segment of tracks;
• and
• sync signal detecting means including:
• a track-initial portion recognition signal generating means for generating a signal indicative of an initial portion of the tracks,
• a window signal generating means for generating a window signal using a segment end signal from the identification detecting means and the signal indicative of the initial portion of the tracks,
• a block sync signal detecting means for detecting a block sync signal region provided from the data restoring means, and
• a sync signal processing means for processing a sync signal detected from a window signal region provided from the window signal generating means as if the sync signal is matched for the sync signal with an error of less than a preset number of bits.

An apparatus for detecting a sync signal in digital data in a digital recording device comprising:

• data restoring means for producing serial data and a serial clock signal received from a reproducing head of the digital recording device;
• a signal generator for producing an initializing signal corresponding to a segment start in the digital data;
• a detector for detecting a format of a reproducing operation of the digital data;
• identification detecting means for producing a signal indicative of an end of reading one segment of tracks;
• and
• sync signal detecting means, responsive to the serial data, the serial clock signal, the initializing signal, the format of the reproducing operation, and the signal indicative of the end of the reading of one segment of tracks, for determining correspondence in sync patterns even in a case where not all corresponding bits coincide with one another, for removing erroneously detected sync patterns using a window situated around a position at which a sync signal is produced, and for detecting a sync signal, wherein the sync signal produces a segment start signal using the initializing signal, the segment start signal being received by the identification detecting means.

An apparatus for detecting a sync signal in digital data in a digital recording device comprising:

• data restoring unit producing serial data and a serial clock signal received from a reproducing head of the digital recording device;
• a signal generator for producing an initializing signal corresponding to a segment start of the digital data;
• a detector for detecting a format of a reproducing operation of the digital data;
• an indicator producing a signal indicative of an end of reading one segment of tracks;
• and
• sync signal detector, responsive to the serial data, the serial clock signal, the initializing signal, the format of the reproducing operation, and the signal indicative of the end of the reading of one segment of tracks, determining correspondence in sync patterns even in a case where not all corresponding bits coincide with one another, for removing erroneously detected sync patterns using a window situated around a position at which a sync signal is produced, and for detecting a sync signal,
• wherein the sync signal produces a segment start signal using the initializing signal, the segment start signal being received by the indicator.

A method for detecting a sync signal in digital data in a digital recording device comprising:

• producing serial data and a serial clock signal received from a reproducing head of the digital recording device;
• generating an initializing signal corresponding to a segment start, the initializing signal being used to produce a segment start signal;
• detecting a format of a reproducing operation;
• producing a signal indicative of an end of reading one segment of tracks;
• and
• determining correspondence in sync patterns even in a case where not all corresponding bits coincide with one another, removing erroneously detected sync patterns using a window situated around a position at which a sync signal is produced, and detecting a sync signal, responsive to the serial data, the serial clock signal, the initializing signal, the format of the producing operation, and the signal indicative of the end of the reading of one segment of tracks.

A method for detecting a sync signal in digital data in a digital recording device comprising:

• producing serial data and a serial clock signal received from a reproducing head of the digital recording device;
• generating an initializing signal corresponding to a segment start, the initializing signal being used to produce a segment start signal;
• detecting a format of a reproducing operation;
• producing a signal indicative of an end of reading one segment of tracks;
• and
• responsive to the serial data, the serial clock signal, the initializing signal, the format of the reproducing operation, and the signal indicative of the end of the reading of one segment of tracks, determining correspondence in sync patterns even in a case where not all corresponding bits coincide with one another, removing erroneously detected sync patterns using a window situated around a position at which a sync signal is produced, and detecting a sync signal.

A method for detecting a sync signal in digital data for a digital video tape device, the method comprising the steps of:

• producing serial data and a serial clock signal received from a reproducing head of the digital video tape device;
• producing a head switching pulse and a super-video home system (S-VHS)/video home system (VHS) discriminating signal;
• producing a signal indicative of an end of reading one segment of tracks;
• and
• determining, in response to the serial data, the serial clock signal, the head switching pulse, the S-VHS/VHS discriminating signal, and the signal indicative of the end of the reading of one segment of tracks, correspondence in sync patterns even in a case where not all corresponding bits coincide with one another, for removing erroneously detected sync patterns using a window situated around a position at which a sync signal is produced, and for detecting a sync signal.