Abstract: A phase-locked loop (PLL) that provides a local oscillator signal for a radio. An oscillator of the PLL supplies an oscillator output signal. Control logic receives a request to change the oscillator output signal to a new frequency and responds to the request by setting a first capacitor circuit of the oscillator to a first capacitance that corresponds to a predetermined frequency of the oscillator output signal. The control logic also responds to the request by setting one or more other capacitor circuits of the oscillator according to temperature and according to a frequency difference between the predetermined frequency and the new frequency. After responding to the request by setting the first capacitor circuit and the one or more other capacitor circuits, the PLL locks to the new frequency using a signal from the PLL loop filter to adjust another capacitor circuit in the oscillator.

Abstract: A computer-implemented method for processing a multimedia resource, an electronic device and a storage medium are provided. The method includes: sequentially performing decoding processing on a plurality of pictures in a multimedia resource, for each of the plurality of pictures to be decoded, the decoding processing includes: decoding the picture to be decoded to generate a picture to be rendered; placing the picture to be rendered to a rear of a buffer queue; performing rendering processing on one or more pictures to be rendered in the buffer queue, the rendering processing includes: taking out a picture to be rendered at a front of the buffer queue; rendering the picture to be rendered; and the sequentially performing decoding processing on a plurality of pictures to be decoded in the multimedia resource and the performing rendering processing on one or more pictures to be rendered in the buffer queue are executed concurrently.

Abstract: An audio data processing method, an electronic device, and a storage medium are provided, which are related to the field of data processing. The method includes: receiving sound production requests respectively sent by a plurality of sound production applications, wherein respective sound production requests include information of ports corresponding to respective sound production applications; acquiring audio data and sound mixing parameters corresponding to the respective sound production applications through the ports corresponding to the respective sound production applications; and mixing respective audio data according to the sound mixing parameters for the respective sound production applications, to generate audio data to be played.

Abstract: The disclosure provides a packet loss recovery method for an audio data packet an electronic device and a storage medium. The method includes: receiving an audio data packet sent by a vehicle-mounted terminal, and identifying a discarded first sampling point set in response to detecting packet loss; obtaining a second sampling point set and a third sampling point set each adjacent to the first sampling point set, in which the second sampling point set is prior to the first sampling point set, the third sampling point set is behind the first sampling point set; and generating target audio data of the first sampling points based on first audio data sampled at the second sampling points and second audio data sampled at the third sampling points, and inserting the target audio data at sampling positions of the first sampling points.

Abstract: A service method for head unit software includes: obtaining operations related to the HU software; determining service interfaces of operation services comprised in HU system software corresponding to the operations, in which the HU system software is connected to the HU software; and calling the service interfaces to obtain results of executing the operations by the operation services.

Abstract: A data transmission method and apparatus, and an electronic device are provided. The method includes acquiring a data packet to be transmitted, performing fragmentation processing on the data packet to be transmitted to acquire fragmented data packets; sending all the fragmented data packets to a vehicle machine system in sequence; receiving an acknowledgment message sent by the vehicle machine system once the vehicle machine system receives one of the fragmented data packets; acquiring a target fragmented data packet that needs to be retransmitted in response to determining that at least one of the fragmented data packets needs to be retransmitted based on received acknowledgment messages, and resending the target fragmented data packet to the vehicle machine system.

Abstract: An audio data processing method, an electronic device, and a storage medium are provided, which are related to the field of data processing. The method includes: receiving sound production requests respectively sent by a plurality of sound production applications, wherein respective sound production requests include information of ports corresponding to respective sound production applications; acquiring audio data and sound mixing parameters corresponding to the respective sound production applications through the ports corresponding to the respective sound production applications; and mixing respective audio data according to the sound mixing parameters for the respective sound production applications, to generate audio data to be played.

Abstract: A video frame extraction method performed by a computing device includes: obtaining a key frame timestamp table of a video based on a first sampling stride, the first sampling stride being adjusted according to a length of the object video; obtaining a timestamp of a key frame to be extracted from the key frame timestamp table based on a second sampling stride, the second sampling stride being determined according to a quantity of key frame timestamps in the key frame timestamp table and a quantity of to-be-extracted key frames; reading, according to the timestamp, frame data of the key frame; and generating, based on a hard decoding result of the frame data, a thumbnail corresponding to the key frame.

Abstract: A video frame extraction method performed by a computing device includes: obtaining a key frame timestamp table of a video based on a first sampling stride, the first sampling stride being adjusted according to a length of the object video; obtaining a timestamp of a key frame to be extracted from the key frame timestamp table based on a second sampling stride, the second sampling stride being determined according to a quantity of key frame timestamps in the key frame timestamp table and a quantity of to-be-extracted key frames; reading, according to the timestamp, frame data of the key frame; and generating, based on a hard decoding result of the frame data, a thumbnail corresponding to the key frame.