Synchronization of audio channel timing
View Patent ↗Synchronization of plural outputs of data transported by a wireless network is facilitated by bandlimiting a sample clock signal controlling a rate at which data is processed by the network's devices and/or bandlimiting wall time data controlling the real time for presenting a datum.
1. An audio system comprising:
(a) a first listener including:
(i) a wall clock maintaining a wall time for occurrence of an event, said wall time updated by data transmitted by a master clock and received by said first listener;
(ii) a sample clock recoverer retrieving a sample clock from data received by said first listener from a talker, said sample clock regulating a processing rate for a datum included in said data received from said talker; and
(iii) a frequency filter bandlimiting said sample clock output by said sample clock recoverer; and
(iv) a transmitter transmitting said bandlimited sample clock; and
(b) a second listener arranged to receive said transmitted bandlimited sample clock and use said bandlimited sample clock to regulate processing data received from said talker; wherein said frequency filter comprises a low band width type 2 phase locked loop connected to receive said sample clock output by said sample clock recoverer.
2. An audio system comprising:
a first listener including:
a wall clock maintaining a wall time for occurrence of an event, said wall time updated by data transmitted by a master clock and received by said first listener;
a sample clock recoverer retrieving a sample clock from data received by said first listener from a talker, said sample clock regulating a processing rate for a datum included in said data received from said talker; and
a frequency filter bandlimiting said sample clock output by said sample clock recoverer; and
a transmitter transmitting said bandlimited sample clock; and a second listener arranged to receive said transmitted bandlimited sample clock and use said bandlimited sample clock to regulate processing data received from said talker; wherein the first listener further comprises a frequency filter attenuating a frequency of said updating data received from said master clock.
3. The audio system of claim 2 wherein said updating data received from said master clock comprises a timing synchronization function datum.
4. The audio system of claim 2 wherein said updating datum received from said master clock comprises a precision time protocol datum.
5. An audio system comprising:
(a) a first listener including:
(i) a wall clock maintaining a wall time for occurrence of an event, said wall time updated by a data transmitted by a master clock and received by said first listener;
(ii) a frequency filter bandlimiting said updating data received from said master clock and said wall time;
(iii) a sample clock recoverer retrieving a sample clock from data received by said first listener from a talker, said sample clock regulating a processing rate for a datum included in said data received from said talker;
(iv) a transmitter transmitting said bandlimited wall time; and
(v) a frequency filter attenuating a frequency of said updating data received from said master clock;
(b) a second listener arranged to receive said bandlimited wall time and to use said bandlimited wall time to recover a sample clock from data received from said talker.
6. The audio system of claim 5 wherein said frequency filter comprises a low band width phase locked loop arranged to receive said updating data received from said master clock.
7. The audio system of claim 5 wherein said updating data received from said master clock comprises a timing synchronization function datum.
8. The audio system of claim 5 wherein said updating datum received from said master clock comprises a precision time protocol datum.
9. The audio system of claim 5 wherein said frequency filter comprises a low band width type 2 phase locked loop arranged to receive said updating data received from said master clock.