Harris Corporation

Gatesair, Inc.

Imagine Communications Corp.

Junius Adonis Kim

Keyur Ranchhod Parikh

Jeffrey Sebastian Pattavina

Charles E Alexander

As one example, a system includes a first timestamp generator to provide a first timestamp in response to at least one input clock signal. The first timestamp may be derived based on a global time base and have a resolution that resides within a first range of values corresponding to a first time range. A second timestamp generator provides a second timestamp in response to the at least one input clock signal. The second timestamp may be derived based on a second time base and have a resolution that resides within a second range of values complementary to the first timestamp and corresponding to a second time range that is greater than the first time range. A combiner combines the first and second timestamps to provide a reference timestamp having a value over an extended range of continuous time values.

Extended time reference generation

One embodiment includes a system. The system includes a receiver configured to extract a timestamp from a header of each packet of a data stream received from a network and to de-packetize the data stream to provide a stream of data blocks. The timestamp can correspond to generation of each data block associated with each respective packet of the data stream according to a global timebase. The system also includes a delay controller configured to measure a delay associated with each packet of the data stream based on the timestamp relative to the global timebase and to control converting the data stream to a corresponding analog output signal for transmission based on the measured delay.

Transmission system implementing delay measurement and control

Studio-transmitter link (STL) systems and methods are disclosed. In one embodiment, a STL system is provided that includes a STL transmitter comprising a first STL transmitter interface that transmits program content over a first transmission path to a STL receiver, and a second STL transmitter interface that transmits program content over a second transmission path to the STL receiver.

Studio-transmitter link (STL) systems and methods

A device can include a stream builder configured to encode media data at a plurality of different coding rates and to generate a plurality of streams encapsulating the encoded media data. Each of the plurality of streams can have an associated protection level that corresponds to an ability of packet reconstruction and a bandwidth cost. The system can also include a stream replicator configured to transmit each of the plurality of streams to a content receiver via N number of networks. The system can further include an adapter configured to control the coding rate and the protection level of each of the plurality of streams based on a feedback signal transmitted from the content receiver. The feedback signal can characterize a packet loss rate of each of the plurality of streams.

Generating a plurality of streams

A decoder includes a buffer configured to incrementally transport a synchronous data stream through a path of the decoder. A control circuit is configured to control a depth parameter associated with the buffer and to provide a substantially predictable delay of the synchronous data stream through the path of the decoder.

Predictable coding delay over communications networks

A system and method of synchronizing transmissions in a simulcast system by continuously adjusting the signal transmission delay. Timing information that includes a GPS timestamp is continuously generated at a source site, encoded into a timing packet which along with a content signal can be transported over a network link such as T1/E1 or a packet switched network to multiple transmitter sites. Once received at a transmitter site, the timing packet along with the content signal is delayed by an adjustable delay. The GPS timestamp in the received timing packet is compared to a GPS timestamp that is generated at the transmitter site upon arrival of the timing packet. Based on a variance between that comparison and the value of a user-specified target delay, the delay of the received signal is adjusted to synchronize signal transmissions in the simulcast system.

Automatic delay compensated simulcasting system and method

A method of encapsulating TDM data into individual data packets for transmission across a packet network includes delineating the TDM data into one or more signaling multiframes, wherein each signaling multiframe includes one period of a periodic signaling pattern. The method also includes appending a header that is associated with the individual data packets to each of the signaling multiframes of TDM data. Further, a method of selecting the number of multiframes of TDM data in the data packet includes calculating the efficiency of the data packet as a function of the number of multiframes, and selecting the number of multiframes so that the efficiency of the data packet increases exponentially as a number of time-slots in the TDM data increases.

Method and system for encapsulating time division multiplex data into individual packets of a packet based network

A system for transmitting and receiving control data in a TDM communications network includes a single master TDM multiplexor and one or more slave TDM muliplexors. The master station stimulates the one or more slave stations, and only one station can transmit control data at any given time. Both slave and master TDM multiplexors include (i) a receiver component for extracting control data from the TDM signal and passing this control data to a control processor; (ii) a transmitter component for inserting control data from a control processor into the TDM signal; and (iii) a bridging component for passing control data along to the next TDM multiplexor without the need for control processor intervention. The system allows a single node in the network to communicate with and control all the nodes in the network. The system can control other TDM sub-networks using secondary communication links.

Growing community of inventors

Cincinnati, OH, United States of America

Junius Adonis Kim