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US 10,542,304 B2Granted
Transmission device, transmission method, reception device, and reception method
AssigneeSony Corporation
InventorIkuo Tsukagoshi
Life of this patent
Estimating the term…
Abstract
A video encoder generates a video stream including image data. A subtitle encoder generates a subtitle stream including subtitle information. An adjustment information insertion unit inserts luminance level adjustment information for adjusting the luminance level of a subtitle, into the video stream and/or the subtitle stream. A transmission unit transmits a container in a predetermined format containing the video stream and the subtitle stream. The reception side is enabled to perform subtitle luminance level adjustment.
Claims18
A transmission device, comprising:
- processing circuitry configured to
- generate a video stream including image data,
- generate a subtitle stream including subtitle information,
- insert luminance level adjustment information into at least one of the video stream and the subtitle stream, the luminance level adjustment information including an average luminance value generated in accordance with the image data and including a threshold value indicating whether luminance of a subtitle foreground or a subtitle background in the subtitle stream is to be adjusted, and
- transmit a container containing the video stream and the subtitle stream.
2 more elements
A transmission method, comprising:
- generating, by processing circuitry, a video stream including image data;
- generating, by the processing circuitry, a subtitle stream including subtitle information;
- inserting, by the processing circuitry, luminance level adjustment information into at least one of the video stream and the subtitle stream, the luminance level adjustment information including an average luminance value generated in accordance with the image data and including a threshold value indicating whether luminance of a subtitle foreground or a subtitle background in the subtitle stream is to be adjusted;
- and
- transmitting, by the processing circuitry, a container containing the video stream and the subtitle stream.
2 more elements
A reception device, comprising:
- processing circuitry configured to
- receive a container containing a video stream including image data and a subtitle stream including subtitle information,
- obtain image data by performing a decoding process on the video stream,
- obtain bitmap data of a subtitle by performing a decoding process on the subtitle stream,
- perform a luminance level adjustment process on the bitmap data in accordance with luminance level adjustment information inserted in at least one of the video stream and the subtitle stream, the luminance level adjustment information including an average luminance value generated in accordance with the image data and including a threshold value indicating whether luminance of a subtitle foreground or a subtitle background in the subtitle stream is to be adjusted, and
- superimpose bitmap data obtained after the luminance level adjustment on the obtained image data.
3 more elements
A reception method, comprising:
- receiving, by processing circuitry, a container containing a video stream including image data and a subtitle stream including subtitle information;
- obtaining, by the processing circuitry, image data by performing a decoding process on the video stream;
- obtaining, by the processing circuitry, bitmap data of a subtitle by performing a decoding process on the subtitle stream;
- performing, by the processing circuitry, a luminance level adjustment process on the bitmap data in accordance with luminance level adjustment information inserted in at least one of the video stream and the subtitle stream, the luminance level adjustment information including an average luminance value generated in accordance with the image data and including a threshold value indicating whether luminance of a subtitle foreground or a subtitle background in the subtitle stream is to be adjusted;
- and
- superimposing, by the processing circuitry, bitmap data obtained after the luminance level adjustment on the image data.
3 more elements
Dependencies are inferred from the claim text.