Abstract:
An apparatus for transmitting digital multimedia broadcasting includes: a base layer processor that outputs a base layer stream; an enhancement layer processor that outputs an enhancement layer stream; and a transmitter that modulates the enhancement layer stream based on one of a first and second hierarchical modulation modes using different modulation schemes and maps a symbol of the modulated enhancement layer stream based on a symbol position of the base layer stream to generate a transmission frame.
Abstract:
The present invention provides a digital multimedia broadcasting transmitting apparatus, including: a pilot signal generator that is used in estimating a transmission channel in a receiving apparatus and generates a pilot signal including at least one information a; a subcarrier mapping unit that maps the pilot signal to a subcarrier corresponding thereto; and a modulating unit that modulates an output of the subcarrier mapping unit, wherein the pilot signal has a value for specific information rather than a predetermined value in the receiving apparatus.
Abstract:
A Unified Speech and Audio Codec (USAC) that may process a window sequence based on mode switching is provided. The USAC may perform encoding or decoding by overlapping between frames based on a folding point when mode switching occurs. The USAC may process different window sequences for each situation to perform encoding or decoding, and thereby may improve a coding efficiency.
Abstract:
Disclosed is a system for providing an electronic program guide and a method of providing the same, the electronic program guide (EPG) being about a plurality of programs supplied through a digital broadcasting system, including the steps of receiving service information (10) transmitted from the digital broadcasting system, and extracting the EPG information (20) from the service information (10) to store the EPG information; analyzing a user's request (50) and extracting EPG information that meets the user's request from the stored EPG information to produce tailored EPG information; converting the tailored EPG information into speech EPG information (30); and reproducing the speech EPG information (30) as speech to provide users with the EPG information.
Abstract:
A digital multimedia broadcasting transmitting apparatus includes: a variable spreader (120) that spreads a pilot signal to a frequency domain and outputs a signal having a format where the pilot signal is partially inserted to the entire subcarriers; a modulator (130) that modulates the output of the variable spreader (120); and an antenna (140) that transmits the signal modulated by the modulator (130).
Abstract:
Disclosed is an LPC residual signal encoding/decoding apparatus of an MDCT- based unified voice and audio encoding device. The LPC residual signal encoding apparatus analyzes a property of an input signal, selects an encoding method of an LPC filtered signal, and encodes the LPC residual signal based on one of a real filterbank, a complex filterbank, and an algebraic code excited linear prediction (ACELP).
Abstract:
Disclosed is an audio object editing apparatus of a multi-object audio coding apparatus. The audio object editing apparatus of the multi-object audio coding apparatus may include an object information extracting unit (210) to receive an object bit stream and to extract object information from the object bit stream, a downmix processing unit (220) to receive a downmix signal, and to control the downmix signal using object editing information and the object information, and a bit stream processing unit (230) to edit the object information according to be object editing information, and to generate a controlled object bit stream based on the edited object information.
Abstract:
The present invention discloses a vertex position multistage-compression method of 3-D graphics models using predictive residual vector quantization. It is an object of the present invention to provide a compression method for compressing vertex position data of a 3-D graphics model into multilevel by repeatedly performing a process by which predictive errors of vertex position are vector-quantized and then compressed, and the predictive residual signals are calculated and vector-quantized. To accomplish the object, the compression method according to the present invention, which is applied to an encoding and decoding apparatus of 3-D graphics models, includes (1) obtaining predictive errors of vertex position and then vector-quantizing/compressing them; and (2) obtaining quantization errors, repeatedly performing vector-quantization process for the obtained quantization errors and then compressing them into multistage.
Abstract:
An apparatus for providing I-centric services using a service delivery platform which is user-centric layered and a service providing method using the same are provided. The apparatus includes a media service platform providing an enabler obtained by abstracting resources and an I-centric enabler, a service creation environment providing a layered service creation and execution environment for each user, and a service execution environment. A personal user, a third party service provider and a service provider can create and provide various personalized services using the media service platform, the service creation environment and the service execution environment.
Abstract:
The present invention relates to a method and an apparatus for generating an additional information bit stream of a multi-object audio signal. The apparatus for generating an additional information bit stream of a multi-object audio signal according to the present invention includes a spatial cue information input unit for taking, as an input, spatial cue information generated from a multi-object audio signal encoding device, a preset information input unit for taking, as an input, preset information for a multi-object audio signal, and an additional information bit stream generating unit for generating an additional information bit stream by using the spatial cue information and the preset information. The additional information bit stream includes a header region and a frame region. The preset information is included in the frame region. The apparatus of the present invention is advantageous as it is capable of changing set audio scene information in accordance with the idea of an editor or a sound engineer even during reproduction of a multi-object audio signal because preset information is included in the frame region of the additional information bit stream generated during encoding of the multi-object audio signal.