Abstract: A signal receiver (300) has a tuner (301), which receives an RF_IN signal and outputs a desired IF_OUT intermediate frequency signal to a demodulator (311). The demodulator (311), on the basis of the signal level received from the tuner and the AGC characteristic set by a processor (321), controls the RF_AGC and IF_AGC tuner gains. The demodulator operation may also base on the signal level read from the IF_OUT output of the IF_Amp amplifier. The demodulator (311) sends to the processor (321) a digital stream of a desired signal TS. The processor comprises an AGC characteristic controller (327) for calculating the AGC characteristic of the tuner on the basis of a level of the desired signal and a strongest level of close signals, which are detected within the passband of the input filter (101) of the tuner (301) for the desired signal.

Abstract: A signal receiver (300) has a tuner (301), which receives an RF_IN signal and outputs a desired IF_OUT intermediate frequency signal to a demodulator (311). The demodulator (311) controls the RF_AGC and IF_AGC tuner gains according to an AGC characteristic of the tuner, to provide a constant level of the IF_OUT signal. The demodulator (311) sends to the processor (321) a digital stream of a desired signal TS. The processor comprises an AGC characteristic controller (327) for calculating the AGC characteristic of the tuner on the basis of a level of the desired signal and a strongest level of close signals, which are detected within the passband of the input filter (101) of the tuner (301) for the desired signal.

Abstract: A cable modem for connecting Customer Premises Equipment (CPE) includes a Media Access Control (MAC) layer controller, a Logical Link Control (LLC) bridge (113) interacting with the MAC layer controller, an IP stack processing IP frames and interacting with the LLC bridge (113), CPE interfaces (115, 116 and 117) and a multiplexer (114) of Customer Premises Equipment (CPE) interfaces linked to the CPE interfaces and to the LLC bridge (113). The CPE interfaces (115, 116 and 117) communicate with the multiplexer (114) through appropriate functions. The multiplexer (114) has functionality allowing for servicing the flow of frames between the cable network and the interfaces linked to it, directing the received frames to appropriate interfaces.

Abstract: The object of the invention is a software method of emulation of the EEPROM memory in another non-volatile memory, for example the Flash type memory. This method is applicable in systems, where in order to decrease costs of devices, using a non-volatile EEPROM memory, the existing memory is used, for example the Flash type memory for emulation of the EEPROM memory.

Abstract: In a method for memory allocation for images, when storing data describing an image (10) in operating memory (1), the image (10) is divided into lines, and each line is described by a separate subset of data from which at least one set of data is created, to which a free segment of operating memory (1) is assigned. The creation of sets of data is performed until data describing the whole image (10) is assigned to the sets of data, and when reading the image (10), consecutive lines are read from the operating memory (1), until the whole image (10) is read.

Abstract: A receiver of analogue video signal having means for analogue video signal conversion has a receiving block (201) for receiving a first analogue video signal, a conversion block (202) for conversion of the first analogue signal into a digital signal, a buffer controller (203) of frame buffers, a video coder (204) for transforming the digital signal into an analogue signal of a second format, a receiver (205) for displaying the analogue signal of a second format and a processor (206) for data processing and controlling the receiving block, the conversion block, the buffer controller, the video coder and the receiver. The buffers controller (203) has three modules, namely, buffers (203b) linked together, a decoding frame controller (203a) and a displaying frame controller (203c). Certain frames in this device will be omitted when the output frames frequency is lower than the input frequency and displayed more than once when the output frames frequency is higher than the input frequency.

Abstract: In a class D electroacoustic amplifier (1) without feedback loop containing a supply voltage source (8), an amplifier low-pass filter (14), a power stage (2) controlled by a pulse width modulated signal, a saw-shaped voltage generator (4) and a comparator (3), to one of which inputs an audio signal is sent, while its second input is connected to the adder (6) of the compensation circuit of supply voltage influence on the output audio signal, to which a voltage from a reference voltage source is sent, a low-pass filter (9) and a high-pass filter (10) are connected to the supply voltage source (8), and the reference voltage source (12) is connected to an inverting circuit (11), whose input is connected to the low-pass filter (9) output, while the high-pass filter (10) output and the output of the inverting circuit (11) are connected to a multiplier (7), whose output is connected to the input of another multiplier (5), whose second input is connected to the saw-shaped voltage generator (4), and the multiplier (5

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: The present invention relates to a memory card (201) for a digital television decoder, which has a memory block (202) with a separate data memory area (205). The separate data memory area (205) can have the size from ten megabytes to a few gigabytes and can be used for storing audio/video data, audio data or application programs for the digital television decoder. The card also comprises a conditional access circuit (207) for descrambling of data stored in the separate data memory area (205), and a controller (206) for controlling the data flow inside the card. The controller (206) allows replay of data from the separate data memory when the conditions for replay of data, stored separately for each data file, are met.

Abstract: A set of printed circuit boards consists of a main board with at least one fragment intended for replacement and at least one replacement board, wherein said main board has openings in the dielectric layer placed along the edge line of the fragment intended for replacement, and between the openings there are bridges, and at least one of said bridges has an electric conductor thereon, and the replacement board has electric conductors in places matching the placement of the electric conductors of said bridges of the main board.

Abstract: A data signal receiver has a processor and interfaces, RAM, ROM, NV-RAM and non-volatile memory linked to the processor. A decompressing program of a loader and the loader in a compressed form is stored in the non-volatile memory and after being decompressed, by the decompressing program, the loader is stored in a section of the RAM memory, the section being declared as ROM memory. The loader is a program receiving a data signal receiver's code from external sources and exchanges it in the data signal receiver, storing it in the data signal receiver's non-volatile type memory. The loader does not reproduce audio or video signals, but is able to communicate with a user by displaying information on the screen, in order to show a state of current updating of the data signal receiver's software code.

Abstract: The system of transmission of television programs with a variable number of advertisements comprises a transmitter (161), a receiving device (101) including a processor block (103) and an AudioNideo block (104) linked to the processor block (103) and generating signal in format acceptable to a television set. The transmitter (161) transmits a television signal including television programs, advertisements and control signals. The receiving device (101) additionally includes a signal receiving block (102), a mass storage block (105) for recording the television signal and its subsequent playback and the mass storage block.

Abstract: A method of automatic control of a digital television decoder operation uses an Electronic Program Guide system. When a program, from a control list created earlier by a user by selecting specific programs, starts, a decoder changes its operation mode from a sleep mode to an active mode. In the active mode the user can watch only the programs located on the list, and after the program from the list ends, and in case there are no other available programs on the list, the decoder changes its operation mode to the sleep mode. At each time when a new program from the list starts, the decoder generates an information signal. In the described solution there are available many lists controlling the operation of the decoder. The lists are created by the user or set by an operator, and the user chooses which of the lists should control the operation of the decoder.

Abstract: A device for selecting a channel of radio and television sets includes a signal receiving block (103) used to receive the signal (102) and if necessary converting it to a digital format, an A/V block (107) generating the signal to be displayed on the screen in a required format, a memory block (106) containing various types of memory, a central processing unit (105) controlling the functionality of the receiver and a power-on block (111) with a “Power-on” function used for switching-on a set. Channels viewed by the user for a time longer than a defined time interval are stored in the database. This database may be in the form of a list containing information about consecutively selected channels. It can also have the form of tables storing information about the viewing ratings of channels viewed at a given time. The statistics obtained from this database are used to set the appropriate channel upon switching-on the set.

Abstract: A cable modem for connecting Customer Premises Equipment (CPE) includes a Media Access Control (MAC) layer controller, a Logical Link Control (LLC) bridge (113) interacting with the MAC layer controller, an IP stack processing IP frames and interacting with the LLC bridge (113), CPE interfaces (115, 116 and 117) and a multiplexer (114) of Customer Premises Equipment (CPE) interfaces linked to the CPE interfaces and to the LLC bridge (113). The CPE interfaces (115, 116 and 117) communicate with the multiplexer (114) through appropriate functions. The multiplexer (114) has functionality allowing for servicing the flow of frames between the cable network and the interfaces linked to it, directing the received frames to appropriate interfaces.

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.