54results about "Distribution switching arrangements" patented technology

To provide a technique for more preferably transmitting or receiving an advanced digital broadcasting service.SOLUTION: In a display control method in a broadcast receiving device that can receive a broadcast wave that are simulcast between a 4K broadcast service and a 2K broadcast service via a broadcast transmission line, the 4K broadcast service included in the broadcast wave is received, demodulated, a broadcast program of the 4K broadcast service is displayed, the 2K broadcast service which is a simulcast of the 4K broadcast service is received and demodulated when emergency broadcast information is received while a broadcast program of the 4K broadcast service is being displayed, the display screen of the broadcast receiving device is forcibly switched from the display of the broadcast program of the 4K broadcast service to the display of the screen of an emergency broadcast transmitted by the 2K broadcast service.SELECTED DRAWING: Figure 1

In one aspect, an example method includes (i) encountering, by a media playback device of a vehicle, a trigger to update a list of currently tunable radio stations; (ii) based on encountering the trigger to update the list of currently tunable radio stations, updating, by the media playback device, the list of currently tunable radio stations using a location of the vehicle and radio station contour data stored in a local database of the media playback device; and (iii) displaying, by the media playback device, a station list using the list of currently tunable radio stations.

A method and apparatus are described for aligning cross-faded audio signals using beats. In an embodiment, a controller includes a cross-fade module having at least first and second audio inputs and an audio output port to provide an audio output signal to an external audio reproduction system. A control signal determines whether to provide the first or the second audio signal to the audio output, and the cross-fade module cross-fades the audio output signal from one audio signal to the other audio signal. A beat alignment module determines a delay between a first beat of the first audio signal and a second beat of the second audio signal, and a delay module delays either the first or the second audio signal to compensate for the delay into the cross-fade module.

A digital signal processing (DSP) circuit of a system for blending audio signals executes a trained machine learning model to extract audio parameters associated with audio blocks of two received audio signals and generates audio quality scores. Each audio quality score indicates an audio quality of the audio block. Upon analyzing the corresponding audio quality scores of the two audio signals, the DSP circuit outputs an audio block of one of the audio signals based on a previous blended block or blends one of the audio blocks of the two audio signals to output a blended block that includes a composition of the corresponding audio blocks of the two audio signals. The system thus outputs an audio output signal that includes such audio blocks that are associated with at least one of the two audio signals.

The present disclosure provides a system and a method for offloading users from a unicast platform to a broadcast platform. The system receives a request from various users and identifies users accessing similar media content. The system further receives a direction of mobility and a radio capability from the users and determines a point of viewing with a corresponding buffer time. The system determines a sliding window for offloading the one or more users and intelligently offloads the users from a unicast network to a broadcast network across various radio access technologies (RATs).

The application discloses example methods and apparatuses for map generation and for playing broadcast signals. One example map generation method includes receiving multiple pieces of first information, where each piece of the multiple pieces of first information includes a corresponding positioning location of a corresponding terminal, strength of a broadcast signal modulated at a first modulation frequency and received by the corresponding terminal at the corresponding positioning location, and the first modulation frequency. A broadcast signal strength layer is generated according to the multiple pieces of first information, where the broadcast signal strength layer represents a first coverage range corresponding to a first strength range of a broadcast signal modulated at the first modulation frequency.

Example systems, apparatus, and methods receive audio information including a plurality of frames from a source device, wherein each frame of the plurality of frames includes one or more audio samples and a time stamp indicating when to play the one or more audio samples of the respective frame. In an example, the time stamp is updated for each of the plurality of frames using a time differential value determined between clock information received from the source device and clock information associated with the device. The updated time stamp is stored for each of the plurality of frames, and the audio information is output based on the plurality of frames and associated updated time stamps. A number of samples per frame to be output is adjusted based on a comparison between the updated time stamp for the frame and a predicted time value for play back of the frame.

Techniques are described that extend and / or improve the Advanced Television Systems Committee (ATSC) 3.0 television protocol in reliably delivering next-generation broadcast television services, where a receiver selects which frequency to tune to by considering not only the signal strengths and error rates of two frequencies carrying the same service, but also the relative location and direction of movement of the receiver with respect to each broadcast station, as well as parameters of the RF environment previously measured by an autonomous vehicle, such as a drone, in order to automatically switch from presenting the service on a first frequency to a second frequency, such as when a mobile receiver is moving through a boundary area between two broadcast stations.

To provide a technique for more preferably transmitting or receiving an advanced digital broadcasting service.SOLUTION: In a display control method in a broadcast receiving device that can receive a broadcast wave that are simulcast between a 4K broadcast service and a 2K broadcast service via a broadcast transmission line, the 4K broadcast service included in the broadcast wave is received, demodulated, a broadcast program of the 4K broadcast service is displayed, the 2K broadcast service which is a simulcast of the 4K broadcast service is received and demodulated when emergency broadcast information is received while a broadcast program of the 4K broadcast service is being displayed, the display screen of the broadcast receiving device is forcibly switched from the display of the broadcast program of the 4K broadcast service to the display of the screen of an emergency broadcast transmitted by the 2K broadcast service.SELECTED DRAWING: Figure 1

To reduce a user's discomfort at the time of broadcasting switching at a radio device such as an on-vehicle radio device.SOLUTION: A radio device 100 includes: a first reception section (broadcast radio reception section) for receiving a radio signal of broadcast radio broadcasting; a second reception section (broadcast radio reception section) for receiving a radio signal of IP simultaneous radio broadcasting; a time deviation calculation section for calculating a time deviation between a broadcast radio sound based on the radio signal acquired by the first reception section and an IP radio sound based on the radio signal acquired by the second reception section; a postponement time prediction section for predicting a postponement time until switching from the broadcast radio sound to the IP radio sound on the basis of the time deviation; a time deviation calculation section for calculating an expansion rate on the basis of the postponement time; and an expansion / switching section that until an elapse of the postponement time, makes voice output be performed by expanding the broadcast radio sound using the expansion rate and, at the time of the elapse of the postponement time, performs switching to voice output of the IP radio sound.SELECTED DRAWING: Figure 1

A method is disclosed comprising receiving, at a hybrid radio receiver configured to recover audio content from a broadcast radio signal and from a wireless network connection separately, a reception metric indicative of an audio quality of the audio content in the broadcast radio signal at any given time. The method further comprises deriving, from fluctuations in the reception metric over time, a fluctuation indicator indicative of fluctuations in the audio quality likely to be noticed by a listener. The method further comprises deriving, based on a previous switching decision and the fluctuation indicator, a switching decision to use the broadcast radio signal or the wireless network connection as a source of the audio content to introduce a hysteresis into the switching decision, and selecting, based on the switching decision, the broadcast radio signal or the wireless network connection as the source of the audio content.

A period required for channel scanning for a plurality of broadcasting systems is reduced. A reception device includes a demodulation processing unit that confirms a broadcasting system with which demodulation can be performed among a plurality of broadcasting systems in parallel on the basis of a received signal from a tuner shared by the plurality of broadcasting systems at the time of channel scanning, and performs demodulation processing with the broadcasting system with which demodulation can be performed. The demodulation processing unit may determine the broadcasting system with which demodulation can be performed from the plurality of broadcasting systems on the basis of a result of confirmation as to whether a signal that supports the broadcasting system with which demodulation can be performed is included in the received signal. Demodulation processing by the demodulation processing unit may stand by until a channel frequency of the received signal is updated to the broadcasting system with which demodulation can be performed for a broadcasting system with which it is determined that demodulation cannot be performed.

A radio apparatus for a vehicle and a control method thereof is provided. The radio apparatus and control method may provide an occupant of a vehicle, who cannot listen to an Internet radio, to be able to easily listen to radio broadcasts, even when a reception condition of an analog radio transmitted by a radio broadcasting station is poor. When a vehicle whose occupant can listen to the Internet radio is adjacent to a vehicle whose occupant cannot listen to the Internet radio, the Internet radio to which the vehicle whose occupant can listen, may be converted into an analog radio, and the analog radio is transmitted to the vehicle whose occupant cannot listen to the Internet radio by using one or moddre frequencies.

A radio broadcast receiver comprising: a memory; and a processor that is coupled to the memory, and, when executing a program stored in the memory, performs operations. The operations include: receiving analog quality information indicating a reception quality of an analog radio based on a broadcast radio including a digital radio and the analog radio; and determining switching of a radio source from one of the broadcast radio and an IP radio to the other of the broadcast radio and the IP radio based on the analog quality information indicating the reception quality of the analog radio.

A digital signal processing (DSP) circuit of a system for blending audio signals executes a trained machine learning model to extract audio parameters associated with audio blocks of two received audio signals and generates audio quality scores. Each audio quality score indicates an audio quality of the audio block. Upon analyzing the corresponding audio quality scores of the two audio signals, the DSP circuit outputs an audio block of one of the audio signals based on a previous blended block or blends one of the audio blocks of the two audio signals to output a blended block that includes a composition of the corresponding audio blocks of the two audio signals. The system thus outputs an audio output signal that includes such audio blocks that are associated with at least one of the two audio signals.

A system for cross fade-in and fade-out of an audio signal receives time data associated with the audio signal. Initially, the current playback data corresponds to one of the time data. The system determines linear and non-linear data for another time data that is linearly and non-linearly related to the time data, respectively. Further, the system receives a cross-fade-in fade-out request when a parameter value of signal quality associated with the audio signal of the temporal data exceeds a threshold. In response, the system cross-fades the current playback data from the temporal data to the linear data of the other temporal data. In addition, the system inserts the non-linear data into the current playback data to successfully transition from the current temporal data to the other temporal data.

To evaluate the audio quality of radio broadcasts and appropriately switch radio audio in a radio device, such as an in-vehicle radio device.SOLUTION: A radio device includes: a receiving unit that receives digital radio signals which are radio signals of digital radio broadcasts, analog radio signals which are radio signals of analog radio broadcasts, and IP radio signals which are radio signals of IP radio broadcasts, which are simultaneously broadcasted; an evaluation unit that evaluates the sound quality of the analog radio audio using the digital radio audio based on the digital radio signals and the analog radio audio based on the analog radio signals; and a switch unit that switches the audio output of the digital radio audio to either the analog radio audio or the IP radio audio based in the IP radio signals, on the basis of the sound quality evaluation.SELECTED DRAWING: Figure 1

To retransmit a broadcast signal of higher quality while suppressing a delay occurring when retransmitting a broadcast signal of a terrestrial digital signal within an allowable range in a system for retransmitting a broadcast signal after IP transmission.SOLUTION: An IP transmission device receives a broadcast signal of digital terrestrial broadcasting, extracts a channel signal from the broadcast signal, and transmits, to an IP receiving device, an IP packet including a digital signal obtained by digitally converting the channel signal, and signal information indicating the reception status of the channel signal, and the IP receiving device obtains the digital signal and the signal information from the IP packet, determines whether to output the channel signal on the basis of the signal information, and outputs the channel signal based on the digital signal in response to a determination result.SELECTED DRAWING: Figure 1

A radio apparatus for a vehicle and a control method thereof are provided. An aspect of the present disclosure provides a method of controlling a vehicle radio device, the method comprising: checking a program name of a program of an internet radio being listened; searching for a frequency of a first analog radio having the program name, the first analog radio being a radio broadcast transmitted by a radio station; checking the electric field intensity of the first analog radio at the frequency; modulating the internet radio into a second analog radio when the electric field intensity is less than the threshold; and transmitting the second analog radio.

A radio device is provided, comprising: a receiving unit that receives a radio signal of a radio broadcast; another receiving unit that receives a radio signal of an IP simulcast radio broadcast; a calculating unit that calculates a time difference between a broadcast radio audio based on the radio signal received by the receiving unit and an IP radio audio based on the radio signal received by another receiving unit; a predicting unit that predicts a grace time until switching from the broadcast radio audio to the IP radio audio based on the time difference; another calculating unit that calculates a stretch amount based on the grace time; and a switching unit that stretches the broadcast radio audio using the stretch amount to output an audio signal until the grace time expires, and that switches to an audio output of the IP radio audio when the grace time expires.

Techniques are described for expanding and / or improving the Advanced Television Systems Committee (ATSC) 3.0 television protocol in robustly delivering the next generation broadcast television services. A receiver, to automatically switch from presenting a service on a first frequency to a second frequency such as when a mobile receiver is moving through a boundary region between two broadcasters, can temporarily use a satellite link or 5G wireless telephony or other over the top (OTT) source to acquire a service until an OTA link satisfies quality requirements.

A system for cross-fading audio signals receives temporal data associated with the audio signals. Initially, current playback data corresponds to one of the temporal data. The system determines linear and non-linear data of the other temporal data that are linearly and non-linearly correlated with the temporal data, respectively. Further, the system receives a cross-fade request when a parameter value of a signal quality associated with the audio signal of the temporal data exceeds a threshold value. In response, the system cross-fades the current playback data from the temporal data to the linear data of the other temporal data. Additionally, the system inserts the non-linear data to the current playback data to successfully transition from the current temporal data to the other temporal data.

In one aspect, an example method includes (i) encountering, by a media playback device of a vehicle, a trigger to update a list of currently tunable radio stations; (ii) based on encountering the trigger to update the list of currently tunable radio stations, updating, by the media playback device, the list of currently tunable radio stations using a location of the vehicle and radio station contour data stored in a local database of the media playback device; and (iii) displaying, by the media playback device, a station list using the list of currently tunable radio stations.

The method comprises receiving, at a given time, reception metrics indicative of audio quality of audio content in the broadcast radio signal in a hybrid radio receiver configured to separately recover audio content from a broadcast radio signal and from a wireless network connection. The method further comprises deriving a fluctuation indicator indicative of audio quality fluctuations likely to be perceived by a listener from fluctuations in the reception metrics over time. The method further comprises deriving a switching decision to use the broadcast radio signal or the wireless network connection as a source of the audio content based on a previous switching decision and the fluctuation indicator, introducing hysteresis into the switching decision, and selecting the broadcast radio signal or the wireless network connection as the source of the audio content based on the switching decision.

A control method of a vehicle radio device includes: confirming a broadcast name of an internet radio being listened; searching for a frequency at which a first analog radio having the broadcast name is being transmitted; determining whether the signal quality of the first analog radio received at the frequency is good; when it is determined that the signal quality of the first analog radio is poor, determining whether the Internet radio and the first analog radio are the same broadcast; and when it is determined that the Internet radio and the first analog radio are the same broadcast, converting the Internet radio into a second analog radio, and transmitting the second analog radio.

A digital signal processing (DSP) circuit of a system for mixing audio signals executes a trained machine learning model to extract audio parameters associated with audio blocks of two received audio signals and generate an audio quality score. Each audio quality score indicates an audio quality of the audio block. After analyzing the corresponding audio quality scores of the two audio signals, the DSP circuit outputs an audio block of one of the audio signals based on a previous mixed block, or mixes one of the audio blocks of the two audio signals to output a mixed block, the mixing block includes a composition of corresponding audio blocks of the two audio signals. The system thus outputs an audio output signal comprising such an audio block associated with at least one of the two audio signals.

There is provided a radio device including: a reception unit configured to receive a digital radio signal as a radio signal of digital radio broadcasting, an analog radio signal as a radio signal of analog radio broadcasting, and an IP radio signal as a radio signal of IP radio broadcasting, the digital radio broadcasting, the analog radio broadcasting, and the IP radio broadcasting being related to simulcast broadcasting; an evaluation unit configured to perform audio quality evaluation on an analog radio audio by using a digital radio audio based on the digital radio signal and the analog radio audio based on the analog radio signal; and a switching unit configured to switch, based on the audio quality evaluation, an audio output of the digital radio audio to any one of the analog radio audio and an IP radio audio based on the IP radio signal.

The method, in a hybrid wireless receiver that recovers audio from audio sources including broadcast wireless signals and wireless network connections, includes selecting a first audio source from among the audio sources for output audio; periodically deriving switch decisions, each indicating to select one of the audio sources for the output audio source based on reception metrics indicative of the quality of the audio in the broadcast wireless signal; upon detecting a change in the switch decision to select a second audio source instead of the first audio source, initiating a hold time, and enabling the change for the hold time based on subsequent switch decisions that occur during the hold time; and upon successfully enabling the change for the hold time, switching to selecting the second audio source instead of the first audio source for the output audio.

In one aspect, an example method includes (i) encountering, by a media playback device of a vehicle, a trigger to update a list of currently tunable radio stations; (ii) based on encountering the trigger to update the list of currently tunable radio stations, updating, by the media playback device, the list of currently tunable radio stations using a location of the vehicle and radio station contour data stored in a local database of the media playback device; and (iii) displaying, by the media playback device, a station list using the list of currently tunable radio stations.