×

Process and apparatus for synchronizing the block counter in an RDS radio data receiver

  • US 6,195,783 B1
  • Filed: 09/19/1997
  • Issued: 02/27/2001
  • Est. Priority Date: 03/27/1995
  • Status: Expired due to Term
First Claim
Patent Images

1. A method for synchronizing a block counter in an RDS receiver, comprising the steps of:

  • consecutively reading in bits from an output of an RDS receiver to a 26-bit shift register, the bits having a bit frequency and being read into the shift register at the bit frequency;

    cycling the bits in the shift register during a bit period for transfer into a syndrome detection circuit wherein in each bit period, the bits cycle a number of times at least equal to a number of total allowable offset words and bits are X-OR gated with bits of one of a plurality of offset words generated by an offset word generator, the bits being X-OR gated in a standard sequence controlled by an address counter prior to being transferred into the syndrome detection circuit; and

    triggering a sync pulse via the syndrome detection circuit for predetermined cyclically used offset words, the sync pulse being generated when a zero syndrome is detected, the sync pulse setting a block counter to a status of the address counter and resetting a bit counter to zero when the one of the plurality of offset words is a predetermined offset word.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×