DEVICE FOR RECEIVING VIDEO SIGNALS TRANSMITTED OVER A PACKET COMPUTER NETWORK

摘要

The presented invention enables the reception of video signals with variable channel synchronization. All logic elements are located on the receiver side that can work with any transmitter. The receiver comprises one or more sets of modules for image processing. These sets of modules adapt the speed of sending data to the frame generator to the speed of data creation on the transmitter side without the use of a precise time pulse source on both sides of the transfer and without feedback from the receiver to the transmitter. The receiver further includes a memory of channel synchronization configuration which determines the allocation of synchronized channels to groups and the detector of starts of frames. These, along with multiplexers of clock signals, ensure the synchronization of channels within groups and allows for modifying this channel distribution.

主权项

1. A device for receiving video signals transmitted over a packet computer network comprising: a memory of channel synchronization configuration connected to the configuration input of the detector of starts of frames and at least one set of modules for image processing, wherein each set of modules is composed of a buffer with data input, wherein the outputs signalling the line numbers of buffers in all sets of modules are connected to corresponding inputs of the detector of starts of frames and the data output of the buffer is connected to the data input of the frame generator, whose output is the video output of the device, while the enabling inputs of frame generators of all sets of modules are connected to the corresponding outputs of the detector of starts of frames, and the buffer has its occupancy signalling output connected to the inverting input of the differential element, whose noninverting input is connected to the output of memory of the required level of occupancy and whose output is connected to the input of the PID controller, which has its output connected to the control input of the tunable oscillator whose frequency output is connected to a data input of multiplexers in all sets of modules and control inputs of multiplexers in all sets of modules are connected to corresponding outputs of memory of channel synchronization configuration, wherein the output of the multiplexer of clock signals is connected to the clock input of the frame generator.