Realtek Semiconductor Inc.

Industrial Technology Research Institute

Chun-Hao Peng

Tsung-Peng Chuang

Yueh-Feng Lee

Cheng-Pin Chang

Chun-Hsien Wu

Hsin-Sheng Liu

Jyun-Min Dai

Ching-Ying Lai

Yu-Wei Su

An audio processor circuit includes a storage circuit, a digital-to-analog converter circuit, and an amplifier circuit. The storage circuit is configured to store digital audio data from an electrical device. The digital-to-analog converter circuit is configured to convert the digital audio data from the storage circuit into an analog audio signal. The amplifier circuit is configured to provide an output audio signal to an audio playing circuit according to the analog audio signal. If a total data volume of the digital audio data stored in the storage circuit is not a multiple of a throughput or the total data volume of the digital audio data stored in the storage circuit is equal to or greater than an upper limit value, the amplifier circuit is turned off such that the amplifier circuit stops providing the output audio signal to the audio playing circuit.

Audio processor circuit and audio processing method

An audio adapter with a frequency modulation (FM) radio function is provided. The audio adapter includes an audio jack, an FM processing circuit, an audio codec, a digital interface, a memory and a processing unit. The FM processing circuit is configured to receive an FM signal through the audio jack and process the FM signal to generate an FM audio. The audio codec is configured to receive the FM audio and output an analog output audio containing the FM audio through the audio jack. The digital interface transmits power. The memory is configured to store multiple codes or program instructions. The processing unit is configured to execute the codes or program instructions to control the FM processing circuit to search for FM channel(s).

Audio adapter with frequency modulation radio function and operation method thereof

An audio playback device operation method is provided. First audio playback device information corresponding to a first transmission bus format is selected to respond to a host according to a status descriptor request thereof. Whether an audio class-specific request command is received from the host is determined. When the audio class-specific request command is received, the response to the status descriptor request from the host is maintained. When the audio control feature unit descriptor request command is not received, the host is determined to not support the first transmission bus format. Second audio playback device information corresponding to a second audio bus transmission format is selected to response to the host according to the status descriptor request of the host such that when the audio class-specific request command is received, the response to the status descriptor request from the host is maintained.

Audio playback device and operation method of the same

A USB adapting circuit is suitable for being connected between a USB host and an external device. The USB adapting circuit includes a connecting port, a detecting circuit, a standby circuit and a main circuit. The standby circuit receives a power supply from the USB host and supplies the detecting circuit and the main circuit with the power supply. The detecting circuit is configured to output a connected signal when the external device is connected to the connecting port. The standby circuit outputs an enabling signal in response to the connected signal. The main circuit adapts between the USB host and the external device when receiving the enabling signal. Therefore, the main circuit does not work without receiving the enabling signal, and has a power saving effect.

USB adapting circuit

An electronic shelf label controlling system, an electronic shelf label installing method and an electronic shelf label updating method are provided. The electronic shelf label controlling system of the electronic shelf label includes at least an electronic shelf label, a controlling device, a deploying device, and a communication gateway device. The electronic shelf label is disposed on a shelf. The controlling device stores a label location table. The label location table records a relationship between a label identifying information and a label location information of the electronic shelf label. The deploying device is used for obtaining the label identifying information. The communication gateway device is used for communicating the controlling device, the deploying device and the electronic shelf label.

Electronic shelf label controlling system, electronic shelf label installing method and electronic shelf label updating method

A method for a new node to join an ad-hoc network is provided. The method includes two basic functions. When the new node is allowed to join the network, the indicating device of the node being joined generates an indication. When the new node joins the network, the indicating device of the new node also generates an indication. The method further includes two commands, the join-rejection command and the joined-rejection command, to cancel the join procedure when the indicating device of the new node and the node being joined do not indicate correspondingly. Accordingly, the method efficiently reduces the possibility of joining an unanticipated node.

Growing community of inventors

Hsinchu, Taiwan

Chun-Hao Peng