Synchronization detection apparatus and receiving apparatus and methods of the same

A synchronization detection apparatus for detecting synchronization patterns arranged at specific bit intervals in a signal, comprising:

• a comparison circuit for identifying data having the same number of bits as the synchronization pattern in order while shifting positions of data in the signal in units of bits and comparing the identified data with a predetermined synchronization pattern stored beforehand;
• a count circuit for adding or subtracting a predetermined value to or from an input first count to generate a second count when comparison results of said comparison circuit are in agreement;
• a delay circuit for receiving as input the second count, delaying the same by a time corresponding to said specific bit intervals, and outputting the same as the first count;
• and
• a synchronization processing state judging circuit for judging whether or not synchronization has been established based on the second count.

A receiving apparatus comprising a synchronization detection circuit for detecting synchronization patterns arranged at specific bit intervals in a received signal and generating a synchronization signal and a circuit for processing the received signal based on the synchronization signal,

• wherein said synchronization detection circuit comprises:
• a comparison circuit for identifying data having the same number of bits as the synchronization pattern in order while shifting positions of data in the received signal in units of bits and comparing the identified data with a predetermined synchronization pattern stored beforehand;
• a count circuit for adding or subtracting a specific value to or from an input first count to generate a second count when results of said comparisons of said comparison circuit are in agreement;
• a delay circuit for receiving as input the second count, delaying the same by a time corresponding to said specific bit interval, and outputting the same as the first count;
• and
• a synchronization processing state judging circuit for judging whether or not synchronization has been established based on the second count.

A synchronization detection method for detecting synchronization patterns arranged at specific bit intervals in a signal, comprising the steps of:

• identifying data having the same number of bits as the synchronization pattern in order while shifting positions of data in the signal in units of bits;
• comparing the identified data with a predetermined synchronization pattern stored beforehand;
• and
• using the identified data as the synchronization pattern and establishing synchronization when all results of comparisons with a predetermined number of the identified data arranged successively at said specific bit intervals are in agreement.

A synchronization detection method for detecting a synchronization pattern arranged at specific bit intervals in a signal, comprising the steps of:

• identifying data having the same number of bits as the synchronization pattern in order while shifting positions of data in the signal in units of bits;
• comparing the identified data with a predetermined synchronization pattern stored beforehand;
• adding or subtracting a specific value to or from a first count to generate a second count when comparison results of said comparison circuit are in agreement;
• using the second count delayed by a time corresponding to said specific bit interval as the first count;
• and
• judging whether or not synchronization has been established based on the second count.

A receiving method for detecting synchronization patterns arranged at specific bit intervals in a received signal, generating a synchronization signal, and processing the received signal based on the synchronization signal, comprising the steps of:

• identifying data having the same number of bits as the synchronization pattern in order while shifting positions of data in said received signal in units of bits;
• comparing the identified data with a predetermined synchronization pattern stored beforehand;
• and
• using the identified data as the synchronization pattern and generating said synchronization signal when all results of comparisons with a predetermined number of the identified data arranged successively at said specific bit intervals are in agreement.