The present invention relates to enhance Gaussian and Rayleigh sensitivity performance of Digital Audio Broadcast receivers by the following method: The channel impulse response (CIR) peak estimator (101) retrieves the peak positions (102, 103) of the channel impulse response. A set of complex samples of length K are formed from the K complex samples. FFT of size K (104, 105) is evaluated to generate frequency domain samples which are differentially demodulated (DQPSK) (106, 107) to estimate the subcarrier level QPSK symbols (108), marked as r1k (109). The K complex samples beginning from the second peak position (103) are collected. FFT of size K (104, 105) is evaluated on this set of complex samples, whose output is differentially demodulated (DQPSK) to estimate the second set of subcarrier level QPSK symbols r2k. Subcarrier QPSK combination is performed on r2k (110) and r1k (109) to produce the resultant K complex samples (111) of the demodulator.
An audio data sharing method for radio broadcast systems includes sharing audio data using vehicle-to-vehicle communication and vehicle-to-infrastructure communication between vehicles and infrastructure units in low reception areas for radio broadcasting. The audio data sharing occurs by means of tuner leasing. The method also includes forming a framework for message sharing between the different units. The method enables uninterrupted audio data availability in low reception areas for enhancing the customer experience.
H04H 20/02 - Dispositions pour la retransmission des informations radiodiffusées
H04H 20/62 - Dispositions spécialement adaptées à des applications spécifiques, p. ex. aux informations sur le trafic ou aux récepteurs mobiles à la radiodiffusion locale, p. ex. la radiodiffusion en interne aux systèmes de transport, p. ex. dans les véhicules
3.
Method for improving audio acquisition time by nascent signal caching
A method improves audio acquisition time by nascent signal caching. The receiver system includes the processor which contains the ASRC (Arbitrary Sample Rate Converter), demodulator, channel splitter, channel decoder and middleware & application along with the secondary storage system. The nascent digital broadcast radio signal after the sample rate conversion is cached in a secondary storage and given as input to the demodulator. The demodulator starts the demodulation process over the received signal by utilizing default channel parameters and detects the channel parameters of the received signal. If the default channel parameters are different from the detected channel parameters, the demodulator starts the re-demodulation process with the detected channel parameters over the nascent digital signal cached in the secondary storage, instead of waiting for a subsequently transmitted signal, thereby improving the audio acquisition time.
A system ensures reception in low reception or no reception areas and adds regionalized experiences in digital broadcasting. The system includes main transmitter stations and many local or regional transceiver stations. Feedback exists between the local and main transmitter stations to fine tune the transmitted signals based on reception quality, location and the like. The addition of localized or regional content is based on parameters such as user preferences and local data. The regionalized content may vary from local news, local advertisements, customized advertisements, advertisement placement based on social media services data, local emergency warnings, and other parameters. The system addresses both reception issues as well as content regionalization blended with original channel information that are of interest to users of a specific region.
A system and method for alternate program experience in digital broadcasting multiplexes different time duration-based versions of the currently broadcasted program in the same frequency in a broadcast environment. Every program broadcasted in a SES (Special Experience Services) could have different versions (every version is a separate hidden service) of the same program i.e., tiny version, short version, standard version, main/detailed version, wherein the versions differ in the time duration. While parsing the channel information, the Broadcast Media Receiver will comprehend the presence of SES and different hidden services associated with the SES. Depending on the broadcaster business model or/and the user purchased plan, the user will be presented with the option of viewing and selecting the different versions of the program. Upon selection of the version, the receiver switches to the respective hidden service and thereby start playing the respective version of the program.
H04N 21/2362 - Génération ou traitement d'informations de service [SI]
H04N 21/2665 - Rassemblement de contenus provenant de différentes sources, p. ex. Internet et satellite
H04N 21/2365 - Multiplexage de plusieurs flux vidéo
H04N 21/236 - Assemblage d'un flux multiplexé, p. ex. flux de transport, en combinant un flux vidéo avec d'autres contenus ou données additionnelles, p. ex. insertion d'une adresse universelle [URL] dans un flux vidéo, multiplexage de données de logiciel dans un flux vidéoRemultiplexage de flux multiplexésInsertion de bits de remplissage dans le flux multiplexé, p. ex. pour obtenir un débit constantAssemblage d'un flux élémentaire mis en paquets
6.
System and method for large data transmission in digital radio broadcasting
Large data transmission in digital radio broadcasting system and method are disclosed. A first channel information of tuned frequency indicates the availability of the data distribution table. Second channel information contains the data distribution info table (list of frequencies mapped to data chunk identifiers). Data chunks have a unique id. Digital broadcast radio receiver receives data distribution tables and parses through the currently tuned frequencies data distribution table. The receiver has information on how to collect the distributed data. Receiver uses its primary tuner to receive the data chunks in the current tuned frequency. Rest of the data chunks are collected by the background tuners in a parallel fashion by tuning to required frequencies. Once all chunks are collected, data file is reconstructed and available for presentation to the user.
H04H 20/42 - Dispositions de gestion des ressources
H04H 40/18 - Dispositions caractérisées par des circuits ou composants spécialement adaptés à la réception
H04H 60/87 - Dispositions caractérisées par des systèmes de transmission autres que ceux utilisés pour la radiodiffusion, p. ex. Internet caractérisées par le système de transmission lui-même le système de transmission étant Internet l’accès se faisant au moyen de réseaux informatiques
7.
System and method for reducing the service switching time between frequencies in a digital radio
A system and method enhance the user experience in a digital radio by reducing the service switching time between frequencies. The system includes a digital radio transmitter to transmit digital data in a digital radio broadcast standard. The digital radio transmitter includes a first service channel to carry basic service selection information and a second service channel to carry information required for decoding. The digital radio transmitter includes a main service channel to transmit digital audio services and data services. A central server stores information channel data of all digital radio stations. A digital radio receiver stores the first service channel and the second service channel information of all frequencies other than the currently tuned frequency to the receiver internal storage and uses the stored information for demodulating and decoding at the time of service switching between frequencies.
H04H 20/26 - Dispositions de commutation de systèmes de distribution
H04H 20/47 - Dispositions caractérisées par des circuits ou composants spécialement adaptés à la radiodiffusion spécialement adaptés aux systèmes de radiodiffusion couverts par les groupes spécialement adaptés aux systèmes de radiodiffusion stéréophonique
H04L 27/26 - Systèmes utilisant des codes à fréquences multiples
H04H 20/28 - Dispositions de radiodiffusion simultanée de plusieurs informations
8.
Method for improving digital radio mondiale (DRM) acquisition time
A system and method for improving the DRM (Digital Radio Mondiale) signal acquisition time stores the demodulated DRM signal and accesses it from memory in order to avoid the additional time taken in waiting for service description channel (SDC) data. The system includes an antenna to receive a DRM signal. A tuner tunes the frequency of receiver to a desired range. An asynchronous sample rate converter (ASRC) converts the sampling rate of the received signal to a demodulator sampling rate. A demodulator demodulates the received signal. A memory stores the demodulated signal for reuse. A channel splitter splits the received signal into a fast access channel (FAC), a service description channel (SDC), and a main service channel (MSC). A channel decoder decodes the channel split data. A middleware and an application parses and processes the data in order to output the processed data.
H04H 60/15 - Dispositions d'accès conditionnel aux informations radiodiffusées ou aux services relatifs à la radiodiffusion lors de la réception des informations
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