Generation method and transmitting equipment for in band on channel (IBOC) digital/analog audio broadcast signals

A broadcast signal, in-band co-frequency technology, applied in the direction of broadcast information generation, simultaneous broadcast of multiple information, signal channels, etc., to save spectrum resources, eliminate mutual interference, and restore well
CN102394739AActive Publication Date: 2012-03-28SHENZHEN SIKAIWEI ELECTRONICS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHENZHEN SIKAIWEI ELECTRONICS CO LTD
Publication Date
2012-03-28

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Abstract

The invention relates to a generation method and transmitting equipment for in band on channel (IBOC) digital / analog audio broadcast signals. The method comprises the following steps of: generating analog sound broadcast signals of time discrete; generating digital signals, and copying the digital signals in an adjacent signal frame; adding and subtracting the analog sound broadcast signals *2m, *2m + 1 and the corresponding digital broadcast signals in the adjacent signal frame, and acquiring *2m-dm and *2m + 1 + dm; and emitting acquired digital / analog mixed signals in the same broadcast channel. The transmitting equipment comprises an analog sound modulation module, a digital signal modulation module, a mixing module, a digital / analog converter, an upconversion module, a power amplifier and an antenna feeder system, wherein the mixing module comprises an adder and a subtractor so as to acquire the digital / analog mixed signals. According to the method and the equipment, analog / digital mixed signals with completely overlapped frequency spectrums are acquired, frequency bands are saved, and that a receiving end completely separates the digital / analog signals is facilitated.
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Description

(1) Technical field

[0001] The invention belongs to the technical field of digital audio broadcasting, and in particular relates to a generation method and a sending device of a Time Domain Overlapping-In Band On Channel (TDO-IBOC) digital-to-analog audio broadcasting signal. (2) Background technology

[0002] AM (Amplitude Modulation, AM) broadcasting began in 1920, and FM (Frequency Modulation, FM) broadcasting began in 1940. In my country, from the 1950s to the 1960s, medium and short-wave broadcasting developed rapidly. In the 1970s, FM broadcasting rose rapidly, and the sound quality of broadcasting was significantly improved. FM broadcasting has been widely used. Although with the rapid development of TV, Internet, and mobile communication network, traditional audio broadcasting has once become a secondary important media method, and its development speed is far behind other major communication methods, but audio broadcasting has its specific application environment an...

Claims

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