A reproduction apparatus, a reproduction method, a program, and a recording medium configured to stabilize display upon starting of reproduction of an HDR video stream. The reproduction apparatus according to one aspect of the present technology decodes, in a case where a first content including a first HDR video stream to which dynamic metadata including luminance information of a unit of a video frame is added and a second content including a second HDR video stream to which the dynamic metadata is not added and with which static metadata including luminance information of a unit of a content is associated are included in reproducible contents and the second content is to be reproduced, the second HDR video stream, and adds the dynamic metadata to video data obtained by the decoding and outputs resulting data to a display apparatus. The present technology can be applied to a Blu-ray Disc player.

[Object] To contribute to the achievement of a workflow in which an HDR video and an SDR video are compatible with each other. [Solving Means] This video signal processing apparatus includes an HDR video generation unit including a first converter unit that performs OOTF conversion on an HDR video by using an exponentiation function for calculating an exponentiation of 1.2, where 100% is 1, to an input signal level of the HDR video having a range from a point of 0%, where an expression range of an input signal level of an SDR video is 100%, to a change point optionally determined within a range of 100% to 500%, and by using a linear function for multiplying an input signal level of the HDR video having a range higher than the change point by a predetermined coefficient to maintain a change rate of a calculation result in a portion of the change point calculated by using the exponentiation function.

[Object] To contribute to the achievement of a workflow in which an HDR video and an SDR video are compatible with each other.

[Solving Means] This video signal processing apparatus includes an HDR video generation unit including a first converter unit that performs OOTF conversion on an HDR video by using an exponentiation function for calculating an exponentiation of 1.2, where 100% is 1, to an input signal level of the HDR video having a range from a point of 0%, where an expression range of an input signal level of an SDR video is 100%, to a change point optionally determined within a range of 100% to 500%, and by using a linear function for multiplying an input signal level of the HDR video having a range higher than the change point by a predetermined coefficient to maintain a change rate of a calculation result in a portion of the change point calculated by using the exponentiation function.

[Object] To contribute to the achievement of a workflow in which an HDR video and an SDR video are compatible with each other.

[Solving Means] This video signal processing apparatus includes an HDR video generation unit including a first converter unit that performs OOTF conversion on an HDR video by using an exponentiation function for calculating an exponentiation of 1.2, where 100% is 1, to an input signal level of the HDR video having a range from a point of 0%, where an expression range of an input signal level of an SDR video is 100%, to a change point optionally determined within a range of 100% to 500%, and by using a linear function for multiplying an input signal level of the HDR video having a range higher than the change point by a predetermined coefficient to maintain a change rate of a calculation result in a portion of the change point calculated by using the exponentiation function.

There is provided a reproduction apparatus, a reproduction method, a program, and a recording medium that make it possible to stabilize display upon starting of reproduction of an HDR video stream. The reproduction apparatus according to one aspect of the present technology decodes, in a case where a first content including a first HDR video stream to which dynamic metadata including luminance information of a unit of a video frame is added and a second content including a second HDR video stream to which the dynamic metadata is not added and with which static metadata including luminance information of a unit of a content is associated are included in reproducible contents and the second content is to be reproduced, the second HDR video stream, and adds the dynamic metadata to video data obtained by the decoding and outputs resulting data to a display apparatus. The present technology can be applied to a Blu-ray Disc player.

[Object] To contribute to the achievement of a workflow in which an HDR video and an SDR video are compatible with each other. [Solving Means] This video signal processing apparatus includes an HDR video generation unit including a first converter unit that performs OOTF conversion on an HDR video by using an exponentiation function for calculating an exponentiation of 1.2, where 100% is 1, to an input signal level of the HDR video having a range from a point of 0%, where an expression range of an input signal level of an SDR video is 100%, to a change point optionally determined within a range of 100% to 500%, and by using a linear function for multiplying an input signal level of the HDR video having a range higher than the change point by a predetermined coefficient to maintain a change rate of a calculation result in a portion of the change point calculated by using the exponentiation function.

The invention discloses a web-based live broadcasting method, which comprises the steps of real-time intercepting video information captured from a camera so as to obtain camera pictures; storing each frame of the camera picture as a texture object; rendering the texture object, and screening out a reference color of the pixels in the texture object; bonding the rendered texture object to a pre-set virtual background to obtain a bonded scene image information; and encoding the bonded scene image information to generate a video stream for live broadcasting. This invention further discloses a client terminal of web-based live broadcasting and a web-based live broadcasting system. The present invention can meet a requirement of a real-time processing on a picture during live broadcasting and can run smoothly on the mobile phone, with less consumption of resources.

A method, devices, and a non-transitory recording medium for providing contents are provided. The method includes reproducing at least one content, at a first device; transmitting information corresponding to the at least one content from the first device to a second device to reproduce content corresponding to the at least one content in the second device; receiving a message from an external device while reproducing the at least one content at the first device; providing the received message while reproducing the at least one content at the first device; and transmitting information corresponding to the received message from the first device to the second device, the information corresponding to the received message being used to enable the second device to provide a message corresponding to the received message while reproducing the content corresponding to the at least one content.

The invention discloses a web-based live broadcasting method, which comprises the steps of real-time intercepting video information captured from a camera so as to obtain camera pictures; storing each frame of the camera picture as a texture object; rendering the texture object, and screening out a reference color of the pixels in the texture object; bonding the rendered texture object to a pre-set virtual background to obtain a bonded scene image information; and encoding the bonded scene image information to generate a video stream for live broadcasting. This invention further discloses a client terminal of web-based live broadcasting and a web-based live broadcasting system. The present invention can meet a requirement of a real-time processing on a picture during live broadcasting and can run smoothly on the mobile phone, with less consumption of resources.

A video data processing method and/device for display adaptive video playback are disclosed. The video data processing method includes receiving video data and dynamic range mastering information including dynamic range related information of the video data from a source device via an interface, and playing the received video data back. The dynamic range mastering information includes electro optical transfer function, EOTF, type information for identifying an EOTF used for the video data.