Abstract: The objects of the invention are a method for control of data flow in a packet data transmission and a device for control of data flow in a packet data transmission, both being applicable for example in systems of data transmission in formats used in digital television. The method according to the invention is based on the fact that to a data processing device, comprising a network of nodes in the form of input nodes (IN1-INn), output nodes (OUT1-OUTn) and intermediate nodes such as data processing nodes (PROC1-PROCn) or multiplexers (MUX1-MUXo), the nodes being connected as a free-defined structure, signals are supplied to input nodes (IN1-INn) and from the data packets retrieved from these nodes (IN1-INn) transmission units are created.

Abstract: The present invention relates to a system of searching and defining data in tree structures. The system includes a block of analysis of data structure (2), in which the data structure, which is created by data sources (1) connected to the block of data structure analysis (2), is analyzed and also in this block the database is created. The system also includes a data searching block, which searches data according to users criteria. The found data create a database of the output data structure (3), which is updated in the data update block (5) according to queries, defined in the output structure. The data from the output database are passed to the data output (8), while the unit, controlling the operation of the system is a control computer (6), which is operated by the user (7).

Abstract: According to the invention, input MPEG data packets are delivered to appropriate stream buffers from asynchronous program sources. The MPEG data packets have different transmission speeds with defined time stamps of their packets, while the packets of input MPEG streams are multiplexed and have their time stamps corrected in such a way that their assigned time stamps are deleted and replaced by values of time markers calculated according to the algorithm detecting and correcting the detected synchronization errors, after which the packets with so corrected time stamps are appended appropriately to the output MPEG stream. The essence of the invention is based in that packets of each input MPEG stream are transferred from stream buffers to appropriate packet buffers together with information about the time ratios between the neighboring packets of a given MPEG input stream.

Abstract: Dataflow inside the system is based on requests for packets send from an E superior system element (120). A packet appearing at one of the inputs of the first or second multiplexers (105, 109) is sent to its output. In case there is no packet at a given input, information about the lack of a packet is sent instead. The reading of the packet from one of the inputs and sending it to the output is activated by a packet request command, sent to modules (110, 111, 112, 113, 114, 115, 116, 117) connected to the given input. The requested packet, or information of its lack, is then awaited. Subsequently, a search for packets is conducted at the TV1, TV3 live signal inputs (101, 106), beginning with the input defined as the first in line. If no packet is found at the highest priority input, the search moves on to subsequent live signal inputs. If no packets are available at these inputs, the TV2 bitrate input (102) is checked, bypassing inputs with a coefficient of sending greater or equal to one.