Abstract:
오디오 무선 방송 시스템에서 간헐적인 중단을 경감시키는 시스템(100)이 제공되는데, 이 시스템에서 주 무선 신호와 여분의 무선 신호는 송신기 서브시스템(120)으로부터 송신되며 수신기 서브시스템(140)에 의해 수신된다. 오디오 소스(110)의 출력(112)은 무선 주파수 신호(162)를 변조하여 송신 안테나(172)에 접속시키기 위한 변조기(160)에 접속된다. 오디오 소스(110)의 제 2 출력(114)은 지연 회로(116)에 접속되어 소정의 시간 지연을 부가한다. 지연된 오디오 소스 신호는 송신 안테나(172)에 접속되는 제 2 무선 주파수 신호(166)를 변조하는 변조기(164)에 접속된다. 수신기 서브시스템(140)은 주 무선 신호와 지연된 여분의 무선 신호를 수신하여 각각을 복조기(180, 182)에 접속한다. 적어도 복조기(180)는 주 무선 신호에서의 저하를 결정하여 합성 제어 회로(190)에 품질 측정 출력 신호(186)를 제공하는 회로(181)를 포함한다. 복조기(180)로부터 복구된 주 오디오 신호는 제 2 지연 회로(184)에 접속되며, 제 2 지연 회로(184)의 시간 지연은 지연 회로(116)의 시간 지연과 실질적으로 동일하다. 지연 회로(184)로부터의 오디오 출력과 복조기(182)로부터의 여분의 오디오 출력은 합성 서브시스템(135)에 접속되며, 각각은 가중 계수와 조합되고, 그 후 함께 조합되어 합성 오디오 신호를 형성하여 오디오 출력 회로(150)에 접속한다.
Abstract:
An apparatus includes a network receiver for receiving an over-the-air in-band on-channel broadcast signal and extracting broadcast content from the broadcast signal, and an output for delivering the content by way of a first receiver output signal to a plurality of network player devices. A method performed by the apparatus is also included. ® KIPO & WIPO 2009
Abstract:
This invention provides a method of detecting time alignment of an analog audio signal and a digital audio signal in a hybrid radio system. The method comprises the steps of filtering the analog audio signal to produce a filtered analog audio signal, filtering the digital audio signal to produce a filtered digital audio signal, and using the filtered analog audio signal and the filtered digital audio signal to calculate a plurality of correlation coefficients, wherein the correlation coefficients are representative of time alignment between the analog audio signal and the digital audio signal. An apparatus for performing the method is also provided.
Abstract:
A method for digital audio broadcasting comprising the steps of receiving a plurality of data bits (12, 14 and 16) to be transmitted, formatting the plurality of data bits into a plurality of protocol data units, inserting header bits (h) at spaced locations within the protocol data units, and using the protocol data units to modulate a plurality of carriers to produce an output signal. The individual header bits (h) can be positioned at evenly spaced locations in the protocol data units (PAYLOAD). A first one of the header bits can be offset from an end of the protocol data unit. A method of receiving the digital audio broadcasting signal the transmitters and receivers that operate in accordance with the methods are also provided.
Abstract in simplified Chinese:本发明所指之方法,用于接收调频数码声频广播信号,该信号包含一无线电频道之高旁频带中的第一复数个副载波和无线电频道之低旁频带之第二复数个副载波。而且,本发明所指之方法包括以下几个步骤:将数码声频广播信号与本机振荡信号进行混合以产生一中频信号;使中频信号经过一带过滤波器以产生一滤波过之信号;检测数码声频广播信号之高旁频带和低旁频带中是否有一者损坏;和调整本机振荡信号之频率,以改变中频信号之频率,以使带过滤波器消除高旁频带或低旁频带中已损坏之副载波。本发明还提供一种接收器,该接收器依据前述方法处理数码声频广播信号。
Abstract:
An apparatus for controlling a data rate in a data client for a digital audio broadcasting system includes a buffer for storing data, a codec for coding data, and a control module for controlling a bit rate of the codec in response to a level of the data in the buffer. A method performed by the apparatus is also included.
Abstract:
A signal generator includes a memory for storing content information in the form of vectors including in-phase and quadrature elements of an orthogonal frequency division multiplexing waveform, a processor for converting the vectors to a radio frequency signal, and a logic device for controlling the operation of the memory and the processor. The in-phase and quadrature elements represent baseband content of the orthogonal frequency-division multiplexing waveform.
Abstract:
A service registry for a radio broadcasting system includes a memory for storing information relating to services to be provided over the broadcasting system, a processor coupled to the memory, and a core interface for exchanging messages between the processor and a plurality of users, the processor being programmed to retrieve the information from the memory in response to the messages received on the interface, and to output the retrieved information to an importer. A method of broadcasting and a broadcasting system are also provided.
Abstract:
Methods and systems for preparing data for broadcast via digital radio broadcast transmission is disclosed comprising the steps of receiving a plurality of content files corresponding to programming information for program content to be broadcast; receiving an index file having a pointer for each of the plurality of content files, wherein the index file is associated with a first logical address; storing the index file and the plurality of content files; scheduling a broadcast rotation of the index file and the plurality of content files (wherein the index file is scheduled for repeated transmission intermittently relative to selected ones of the content files); and transmitting the index file and the plurality of content files to an importer in accordance with the broadcast rotation.