Decoding method, encoding method, decoding device, encoding device and display device for displaying an image on a transparent screen

A method for displaying a video on a transparent display, the method comprising the following steps:

• receiving a video sequence, wherein the video sequence comprises image data comprising multiple image values representing an image to be displayed;
• for at least one frame of the video sequence:
• encoding the image data of a current frame;
• providing transparency data representing an intended transparency level of at least a region of the image to be displayed, in case that the current frame is intended to represent a transparent image;
• and
• writing the encoded frame into an output video bitstream.

A decoding device comprising a processor for decoding an encoded video bitstream comprising multiple frames, wherein the decoding device is configured to:

• receive the encoded video bitstream, wherein the video bitstream comprises image data comprising multiple image values representing an image to be displayed and transparency data representing an intended transparency level of at least a part of the image to be displayed;
• and
• wherein the processor is, for at least one frame of the video bitstream, configured to:
• decode received image data to obtain a decoded image data;
• determine whether a current frame is associated with transparency data;
• in case that the current frame is associated with transparency data, adjust the decoded image data to obtain a transparency-adjusted image data depending on the received transparency data.