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 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 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 device for controlling decoder extension cards and universal extension cards, comprising a card reader, control circuit and a processor, characterized in that the receiver (1) is connected via the control circuit (2) with the processor (2), select circuit (4) and a card reader (9) connected with a power supply circuit (8), and to the card reader (9) three buffers are connected, where the card reader (9) is connected via the first buffer (5) and the second buffer (6) with the processor, and via the third buffer (7) with the control circuit (2).

Abstract: A device for checking numbers consists of a multiplexer (101) with a controller module (106) linked to it. An output of the multiplexer is connected to a first input of a register (102), which is an element of memory, while a first output of the controller module (106) is connected to an input of a storage (103) and a second input of the register (102). An output of the register (102) and an output of the storage (103) are connected to inputs of the adder (104), which adds on its output a number, stored in the register (102) and a number written in the storage (103) at an address indicated by the controller module (106). The adder (104) generates on its output a carry-out signal, informing about overflow, which is passed to a first controlling input of the controller module (106), which manages operation of the device checking numbers.

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: A method for scrolling MPEG-compressed pictures consists in decoding a sequence of pictures (34, 35, 36) or any two pictures to be viewed by a MPEG decoder (5) and storing the sequence of pictures (35, 35, 36) or any two pictures in MPEG decoder memory. Then the sequence of pictures (34, 35, 36) or any two pictures is formed as a group of pictures (37), which is transferred to the first screen buffer (24) which is active. In the following step, any another compressed picture, after decoding in the MPEG decoder (5), is stored in a MPEG decoder memory as a decoder new picture and then is transferred from the MPEG decoder memory to the first screen buffer (24), where its edge line perpendicular to the intended scrolling direction is adjoined to the external edge of the group of pictures (37).

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: 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: In a system of transmission and reception of radio or television data with a head-end part transmitting data via two channels and receivers of radio or television data having identifiers, the head-end part comprises an interface for transmitting audio/video data and an access rights control block having an interface for transmitting services information (SI), programming package contents and identifiers of the receivers' packages. In turn, the receivers comprise an execution block, which controls access of the receivers to specific channels or programs on the basis of the content of the programming package corresponding to the package identifier of a given receiver.

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: A system for processing data streams in MPEG format has a system controller (110) and an MPEG decoder (115), a memory (121) for storing data streams, a demodulator (151), a signal controller (140), which contains a signal processing system (142) and a digital part (141) of a modulator and an analog part (131) of which constitutes a separate system block. The signal processing system (142) of the signal controller (140) is connected with the demodulator (151), the digital part (141) of the modulator connected with its analog part (131) and the processor (113) of the system controller. The signal processing system (142) of the signal controller (140) receives digital data stream from the demodulator (151) and from the processor (113) and after processing them, it sends the output stream to the digital part (141) of the modulator and to the processor (113).

Abstract: In a system for storing and searching for tags in a data stream, a signal processing block (120) contains a tag analysis block (121) providing functionality of procedures of searching and storing tags within an audio/video data stream. The tag analysis block (121) is provided with a configuration table (122) for storing configuration data for various types of recordings, defining distances of searching and storing tags. In this system a user tag is inserted at a place of existing tag when an existing tag distance is shorter or equal to a predefined tag searching distance. Otherwise, when there is no existing tag within the predefined tag searching distance, the user tag is inserted at the predefined tag searching distance.

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: The present invention relates to a device for control of display of video frames and a method for control of display of video frames, used in digital decoders/receivers of television signal, to which the signal is drawn in an analogue form.

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.