US 2026/0094622 A1Published application

Video data and audio data synchronization device and video data and audio data synchronization method

AssigneeSigmastar Technology Ltd.

InventorJianhua WU

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Abstract

A device includes audio and video input circuits, a processor, an audio output circuit, and a video output circuit. The audio input circuit receives an audio input according to a first clock signal. The processor stores the audio input to a memory according to a write pointer, processes the video input received via the video input circuit to generate and store a video output to the memory, and processes the audio input to generate and store an audio output to the memory. The audio output circuit outputs sub-audio data in the audio output according to a read pointer and a second clock signal, and adjusts the second clock signal. The video output circuit reads frame data in the video output from the memory. The processor determines whether to control the video output circuit to stop outputting according to a timestamp difference between the frame data and the sub-audio data.

Claims10

Dependent claims

A video data and audio data synchronization device, comprising:

an audio input circuit, receiving audio input data from an input interface according to a first clock signal;
a video input circuit, receiving video input data from the input interface;
a processor, configured to perform operations of:
storing the audio input data to a storage space in a memory according to a write pointer;
performing video processing according to the video input data to generate video output data, and storing the video output data to the memory;
and
performing audio processing according to the audio input data to generate audio output data, and storing the audio output data to the storage space of the memory;
an audio output circuit, reading a plurality of sets of sub-audio data in the audio output data from the storage space according to a read pointer and a second clock signal, and adjusting the second clock signal according to the write pointer, the read pointer and the first clock signal;
and
a video output circuit, sequentially reading a plurality of sets of frame data in the video output data from the memory,
wherein the processor further determines, according to a first difference between a video timestamp corresponding to current frame data in the plurality of sets of frame data and an audio timestamp corresponding to current sub-audio data in the plurality of sets of sub-audio data, whether to control the video output circuit to stop outputting the current frame data.

8 more elements

A video data and audio data synchronization method, performed by a video data and audio data synchronization device, the video data and audio data synchronization method comprising:

receiving video input data from an input interface, and receiving audio input data from the input interface according to a first clock signal;
storing the audio input data to a storage space in a memory according to a write pointer;
performing video processing according to the video input data to generate video output data, and storing the video output data to the memory;
performing audio processing according to the audio input data to generate audio output data, and storing the audio output data to the storage space of the memory;
reading a plurality of sets of sub-audio data in the audio output data from the storage space according to a read pointer and a second clock signal, and adjusting the second clock signal according to the write pointer, the read pointer and the first clock signal;
sequentially reading a plurality of sets of frame data in the video output data from the memory;
and
determining, according to a first difference between a video timestamp corresponding to current frame data in the plurality of sets of frame data and an audio timestamp corresponding to current sub-audio data in the plurality of sets of sub-audio data, whether to stop outputting the current frame data.

5 more elements

Dependencies are inferred from the claim text.