HDMI FRL correction system and method thereof
An HDMI FRL error correction system includes a SR/SSB correlator, an SR/SSB lock detector coupled to the SR/SSB correlator, an SR/SSB predictor coupled to the SR/SSB lock detector, an SR/SSB bit error corrector coupled to the SR/SSB correlator, the SR/SSB lock detector and the SR/SSB predictor, and an SR/SSB detector coupled to the SR/SSB bit error corrector. The SR/SSB correlator is used to correlate an input SR signal to a SR signal or correlate an input SSB signal to a SSB signal and generate a correlation result accordingly. The SR/SSB lock detector is used to set a lock flag according to the correlation result.
1 . A High Definition Multimedia Interface (HDMI) Fixed Rate Link (FRL) error correction system comprising:
a Scrambler Reset (SR) and Start of Super Block (SSB) (SR/SSB) correlator configured to correlate an input SR signal to a SR signal or correlate an input SSB signal to a SSB signal and generate a correlation result accordingly;
an SR/SSB lock detector coupled to the SR/SSB correlator, configured to set a lock flag according to the correlation result;
an SR/SSB predictor coupled to the SR/SSB lock detector, configured to output the SR signal or the standard SSB signal according to the lock flag;
an SR/SSB bit error corrector coupled to the SR/SSB correlator, the SR/SSB lock detector and the SR/SSB predictor, configured to correct the input SR signal according to the SR signal and the lock flag to generate an output SR signal, or correct the input SSB signal according to the standard SSB signal and the lock flag to generate an output SSB signal; and
an SR/SSB detector coupled to the SR/SSB bit error corrector, configured to determine whether the output SR signal or the output SSB signal complies with a predefined standard and generate an indicator signal accordingly.
2 . The HDMI FRL error correction system of claim 1 , wherein the input SR signal is correlated to the standard SR signal by a sliding window.
3 . The HDMI FRL error correction system of claim 1 , wherein the input SSB signal is correlated to the SSB signal by a sliding window.
4 . The HDMI FRL error correction system of claim 1 , wherein the lock flag is enabled if the correlation result shows an error rate is lower than a predetermined limit.
5 . The HDMI FRL error correction system of claim 1 , wherein if the lock flag is enabled, the output SR signal is the SR signal, or the output SSB signal is the SSB signal.
6 . The HDMI FRL error correction system of claim 1 , wherein if the lock flag is disabled, the output SR signal is the input SR signal, or the output SSB signal is the input SSB signal.
7 . An error correction method implemented by a High Definition Multimedia Interface (HDMI) Fixed Rate Link (FRL) system, the system comprising a Scrambler Reset (SR) and Start of Super Block (SSB) correlator, an SR/SSB lock detector coupled to the SR/SSB correlator, an SR/SSB predictor coupled to the SR/SSB lock detector, an SR/SSB bit error corrector coupled to the SR/SSB correlator, the SR/SSB lock detector and the SR/SSB predictor, an SR/SSB detector coupled to the SR/SSB bit error corrector, the method comprising:
receiving an input SR signal or an input SSB signal by the SR/SSB correlator;
correlating the input SR signal to a SR signal or the input SSB signal to a SSB signal to generate a correlation result;
setting a lock flag by the SR/SSB lock detector according to the correlation result;
when the lock flag is enabled, correcting the input SR signal by the SR/SSB bit error corrector according to the SR signal to generate an output SR signal, or correcting the input SSB signal by the SR/SSB bit error corrector according to the SSB signal to generate an output SSB signal; and
determining whether the output SR signal or the output SSB signal complies with a predefined standard by the SR/SSB detector to generate an indicator signal.
8 . The method of claim 7 , wherein correcting the input SR signal by the SR/SSB bit error corrector according to the SR signal to generate the output SR signal is setting the output SR signal to the SR signal, and correcting the input SSB signal by the SR/SSB bit error corrector according to the SSB signal to generate the output SSB signal is setting the output SSB signal to the SSB signal.
9 . The method of claim 7 , further comprising when the lock flag is disabled, setting the output SR signal to the input SR signal, or setting the output SSB signal to the input SSB signal.
10 . The method of claim 7 , wherein the input SR signal is correlated to the SR signal by a sliding window.
11 . The method of claim 7 , wherein the input SSB signal is correlated to the SSB signal by a sliding window.
12 . The method of claim 7 , further comprising enabling the lock flag if the correction result shows an error rate is lower than a predetermined limit.