Audio synchronizer control and communications method and apparatus

A method for providing delay change information for a delayed video type first signal which from time to time experiences significant delay changes, including the steps of:

• a) recognizing one or more event which will lead to a significant delay change in said video type signal;
• b) determining delay change information including at least one of the amount and timing of the occurrence of said significant delay change of a);
• c) providing said delay change information in a manner that it may be utilized to correct or maintain synchronization of said video type signal and another signal by devices including one or more of LSI, VLSI, FPGA, ASIC, RISC, DSP and IP Core electronic circuitry.

A method for correcting or maintaining synchronization between a first signal having a delay which from time to time experiences significant delay changes and a second, lesser delayed signal which is delayed by a tracking delay to provide said synchronization, including the steps of:

• a) recognizing one or more event which will lead to a significant delay change in said first signal;
• b) determining delay change information including at least one of the amount and timing of the occurrence of said significant delay change of a);
• c) providing said delay change information for use by said tracking delay.

A method for correcting or maintaining synchronization between a video like first signal having a delay which from time to time experiences significant delay changes and a second audio signal which may be delayed or undelayed and which is further delayed by a tracking delay to provide said synchronization, including the steps of:

• a) recognizing one or more event which will lead to a significant delay change in said video like signal;
• b) determining delay change information including at least one of the amount and timing of the occurrence of said significant delay change of a);
• c) providing said delay change information for use by said tracking delay.

An apparatus for providing delay change information for a first signal passing through a delay circuit which signal from time to time experiences significant delay changes including in combination:

• a) a microprocessor circuit responsive to at least one of said first signal and said delay circuit to recognize one or more event which will lead to a significant delay change in said first signal;
• b) said microprocessor circuit responsive to said event and determining delay change information including at least one of the amount and expected timing of the occurrence of said significant delay change of a);
• c) said microprocessor circuit providing said delay change information in a manner that it may be utilized by other circuits in the measurement, tracking, correction and/or maintenance of the delay of said first signal.

An apparatus for providing delay change information for a video type first signal which is delayed in a delay circuit which video type signal from time to time experiences significant delay changes, including in combination:

• a) a digital circuit responsive to one of said video type signal and said delay circuit to recognize one or more event which will cause a significant delay change in said video type signal;
• b) a microprocessor circuit responsive to said digital circuit of a) to determine delay change information including at least one of the amount and timing of the occurrence of said significant delay change of a);
• c) said microprocessor circuit providing said delay change information in a manner that it may be utilized to correct or maintain synchronization of said video type signal and another signal.

An apparatus for correcting or maintaining synchronization between a first signal delayed in a delay circuit which signal from time to time experiences significant delay changes and a second, lesser delayed signal which is delayed by a tracking delay circuit to provide said synchronization, including in combination:

• a) a microprocessor circuit responsive to at least one of said first signal and said delay circuit and recognizing one or more event which will lead to a significant delay change in said first signal;
• b) said microprocessor circuit determining delay change information including at least one of the amount and timing of the occurrence of said significant delay change of a);
• c) said microprocessor circuit providing said delay change information for use by said tracking delay.

An apparatus for correcting or maintaining synchronization between a video like first signal which is delayed in a delay circuit and which from time to time experiences significant delay changes and an audio type second signal which is delayed by a tracking delay to provide said synchronization, including in combination:

• a) A first digital circuit responsive to at least one of said delay circuit and said video like signal to recognize one or more event which will lead to a significant delay change in said video like signal;
• b) A second digital circuit responsive to said first digital circuit of a) and determining delay change information including at least one of the amount and timing of the occurrence of said significant delay change of a);
• c) A third digital circuit responsive to said second digital circuit of b) and providing said delay change information for use by said tracking delay.