Transmitter for transmitting additional data in terrestrial-digital multimedia broadcasting system, has modulation unit modulating transmission data, and synthesizing unit synthesizing diffusion signal with modulated transmission data

摘要

The transmitter has a service data generating unit (110) including a metadata generating unit (111) to generate metadata for a received message, a service packet generating unit (112) to generate service packets, and a packet header generating unit (113) to generate packet headers. A transmission data generating unit (120) generates transmission data, where a spectrum spreading code is inserted in a predetermined service data. A modulation unit (131) modulates the transmission data, and a signal synthesizing unit (133) synthesizes a diffusion signal with the modulated transmission data. Independent claims are also included for the following: (1) a receiver for receiving additional data in a digital broadcasting system (2) a method for transmitting additional data in a digital broadcasting system (3) a method for receiving additional data in a digital broadcasting system.