Abstract:
PURPOSE: An error-correction code method using layer modulation and an apparatus thereof are provided to enable variable control of error-correction code rate using layer modulation. CONSTITUTION: An interface unit(310) is input with transmitted-data. The first forward error correction encoder(320) produces first parity bits for forward error correction of the transmitted data by the application of first forward error correction code. A second forward error correction encoder(330) produces second parity bits by applying second forward error correction codes on the transmitted data or the first parity bits. A layer modulator(340) modulates the transmitted-data and the first parity bits into an HP stream. The layer modulator modulates the second parity bits into an LP(Low Priority) stream.
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:
Disclosed is a broadcast data transmission system. Said broadcast data transmission system transmits broadcast data by using a plurality of transmission antennas and a plurality of receiving antennas. A broadcast data transmission device comprised in the broadcast data transmission system determines different modulation techniques for each transmission antenna, determines different kinds of transmission power for each data stream according to the determined modulation techniques, and determines different precoding vectors.
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:
Appareil de traitement de données (500) dans un système de radiodiffusion numérique. L'appareil de traitement de données (500) comprend un séparateur de trame (520) qui décode une première trame d'interface de transmission d'ensemble (trame ETI) et sépare des premières données de canal d'information rapide (données FIC) configurant une première trame ETI et des données qui ne sont pas des données FIC, un convertisseur de canal d'information rapide (530) qui convertit les premières données FIC en nouvelles secondes données FIC, et une unité de configuration de trame (540) qui configure une seconde trame ETI sur la base des secondes données FIC et des données qui ne sont pas des données FIC. Selon un mode de réalisation, seulement certaines informations du canal d'information rapide sont changées sans re-multiplexer l'interface de transmission d'ensemble et maintient la partie restante, minimisant le changement de la trameETI d'entrée et simplifiant son changement.
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.