Abstract:
PURPOSE: A device and method for supplying digital contents including usage condition information according to areas are provided to induce users to use digital contents legally and enable a CONSTITUTION: In a digital contents supplying device(51), a digital contents managing unit(502) is provided for storing and managing digital contents. A total usage condition managing unit(504) stores and manages total usage condition information with respect to the digital contents. A partial area information managing unit(507) stores and manages partial area definition information with respect to the digital contents and partial areas usage condition information in accordance with the partial area definition information. A digital contents transmitting unit(508) is interlocked with the digital contents managing unit(502), the total usage condition managing unit(504), and the partial area information managing unit(507), and transmits the digital contents and usage condition information to the digital contents.
Abstract:
PURPOSE: A control device for storing and reproducing digital broadcasting contents is provided to control the record, temporal storage and reproduction of the digital broadcasting contents according to various services in a transmitter and a receiver under digital broadcasting environment and safely protect and manage the broadcasting contents. CONSTITUTION: A connection control unit(18) generates connection control information and a control word for a connection control service. A CCI(Copy Control Information) generating unit(15) generates CCI. A BF(Broadcasting Flag) generating unit(16) generates a BF. An RI generating unit(17) generates RI. A watermarking unit(11) receives CCI, the BF and RI, and watermarks CCI, the BF and RI into a medial signal which is not compressed. An A/V encoder(12) compresses the watermarked media signal. A multiplexing unit(13) receives CCI, the BF and RI, and multiplexes CCI, the BF and RI. A scrambling unit(14) scrambles the multiplexed TS(Transport Stream) according to the control word, and transmits the scrambled TS to a receiver.
Abstract:
PURPOSE: An apparatus and a method for encoding and decoding digital audio are provided to remarkably improve a compression ratio while maintaining the similar quality of sound. CONSTITUTION: A down-sampler(100) receives a digital audio signal for down-sampling the digital audio signal 1/n time as large as the digital audio signal. An audio encoder(200) encodes the down-sampled audio signal by using a digital audio encoding method. A spectrum modeling unit(300) receives spectrum of the input digital audio signal and the down-sampled signal for modeling a frequency band incapable of being encoded, by using a gain value in a bark band between spectrums of compressed signals. A multiplexer(400) receives spectrum compensating bit stream obtained by encoding the gain value and encoding bit stream output from the audio encoder for multiplexing the bit streams to maintain the compatibility with a digital audio encoding standard for outputting a final bit stream.
Abstract:
PURPOSE: A system for inserting and detecting a watermark including template is provided to detect a geometrical deformation in digital contents by using the template and stably extract a watermark signal. CONSTITUTION: A system for inserting a watermark having template and
Abstract:
PURPOSE: A system and method for hierarchically inserting/detecting watermarks are provided to insert and detect different watermarks hierarchically. CONSTITUTION: A system for hierarchically inserting watermarks includes the first and second hierarchical watermark inserting units(220,230). The first and second hierarchical watermark inserting units. The first hierarchical watermark inserting unit receives data into which the watermarks is inserted and inserting the first hierarchical watermark into the data. The second hierarchical watermark inserting unit inserts the second hierarchical watermark independent of the first hierarchical watermark into the data into which the first hierarchical watermark has been inserted. The first hierarchical watermark inserting unit inserts an echo watermark into the overall input data. The second hierarchical watermark inserting unit adds a modulated pseudo noise progression to the first hierarchical watermarked data to generate watermarked data.
Abstract:
PURPOSE: An apparatus for inserting and detecting a watermark using a watermark signal from which a time directional area mean value is removed, and a method thereof are provided to reduce error rate and improve the reliability of a watermarking. CONSTITUTION: A divider(211) receives a reference watermark signal(202) for dividing the reference watermark signal to make sub-watermark signals. A time directional area mean value remover(212) receives the sub-watermark signals for removing a time directional area mean value of the sub-watermark signals. A collator(213) receives the sub-watermark signals from which the time directional area mean value is removed, for recollating the sub-watermark signals to make a watermark signal. An adder(215) receives and adds the original signal(201) and the watermark signal for making a watermarked signal(203).
Abstract:
PURPOSE: A multi-channel audio/voice/data coder-decoder(CODEC) device for a personal computer(PC) is provided to have input/output functions relating to an external multi-channel audio/voice and to have data input/output functions, to control a system by a system control software which exchanges various data with a fixed storage device of the PC to accumulate application programs through the fixed storage device, and which performs control data transmissions and audio/voice/multi media data transmissions, so as to carry out various multi media processing functions. CONSTITUTION: A system control software(10) accumulates execution programs of many application programs(20) in a multi-channel audio/voice/data signal processor(30), and performs multi-channel audio/voice/multi media data processing functions. The multi-channel audio/voice/data signal processor(30) accumulates various multi-channel audio/voice/multi media data processing programs by the application programs(20), and inputs multi-channel audio/voice/multi-media data from the application programs(20), then transmits result data to the application programs(20). The signal processor(30) inputs/outputs the multi-channel audio to an exterior, and inputs/outputs a compressed audio or data to the exterior. A multi-channel audio/voice/data input and output(I/O) unit(40) comprises as follows. A multi-channel audio I/O circuit inputs and outputs the multi-channel audio and the multi-channel voice with the exterior under the control of the application programs(20). A data I/O circuit inputs and outputs compressively-coded data as a digital signal to or from the exterior by a serial interface.
Abstract:
PURPOSE: A method for parallel processing of MPEG-2 advanced audio coding algorithm is provided to supply software structure which can process multi channel compression algorithm in real time by executing real-time processing based on hardware of parallel processing structure. CONSTITUTION: The method for parallel processing of MPEG-2 advanced audio coding algorithm includes two steps. A first step includes several steps. A pulse code modulation data input module into which signal is inputted is executed.(21) A psychology sound modeling module which executes encoding by modeling hearing phenomenon of human is executed.(22) A time/frequency converting module which converts signal of time area to signal of frequency area is executed.(23) A data transmitting part which transmits converted data is executed.(23-1) A second step includes several steps. A data inputting part which receives program waiting signal and signal transmitted from the first step is executed.(24-2) A data compression encoding module which executes compression encoding of multi channel audio signal of frequency area is executed.(24) A quantization module for quantizing compressed audio signal is executed.(25) A bit stream forming module which forms bit stream is executed.(26) The result is transmitted to the first step.
Abstract:
The connecting device for a personal automatic answering and voice mail system includes a subscriber line connecting circuit (1) provided with a voice signal from a subscriber line; a voice signal controlling unit (2) connected to the subscriber line connecting circuit (1) and a telephone set or to a microphone and a loud speaker to convert the voice signal; and an AT bus connecting circuit (3) receiving a digital voice signal from the voice signal controlling circuit (2) by an interrupt of the subscriber line connecting circuit (1)to transmit it to a personal computer where the personal automatic answering and voice mail system is embodied.