Method of video information transmission, as well as an information carrier, a device for receiving and a device for transmitting video information

Abstract

Video information intended to be reproduced on a television screen often includes additional information such as graphics information or subtitles in addition to the main information such as film images. This additional information is transmitted separately, so that the user may choose whether the additional information is to be displayed or not. According to present embodiments, the transmitted video signal includes information relating to the duration for which the additional information is to remain on the display. The additional information can be displayed exactly for the duration of the desired time. When a video disc or tape is used for transferring video information, this is advantageous in trick modes, such as Fast Forward.

1 . A method of producing a presentation, comprising:
 providing basic information including information frames during the presentation of the basic information to an audience; and   providing overlay information during the presentation of the basic information, the overlay information including a predetermined duration of time indicating the duration during the display in which a portion of the overlay information is substituted for a portion of each respective frame of a plurality of the information frames.   
     
     
         2 . A method of producing a presentation, comprising:
 providing basic information including a series of subsequent frames during the presentation of the basic information to an audience, each frame being presented for a predetermined nominal frame period;   providing overlay information during the presentation, the overlay information including a predetermined overlay duration of time during which the presentation of the overlay portion is substituted for respective portions of the presentation of a plurality of the subsequent frames, the overlay duration exceeding the nominal frame period.   
     
     
         3 . A method of producing a presentation, comprising:
 providing basic information to be presented at a variable presentation rate; and   providing overlay information including a predetermined overlay duration of time during which the overlay information is substituted for portions of the basic information during the presentation, the overlay duration being independent of the presentation rate.   
     
     
         4 . A method of producing a presentation, comprising:
 providing a series of frames;   providing overlay information; substituting the overlay information for a portion of each respective frame of multiple frames depending on a predetermined overlay duration during a presentation of the series of frames.   
     
     
         5 . A presentation device, comprising:
 an input for receiving a series of frames and overlay information including a duration;   means for presenting the frames to an audience;   means for substituting, during the presenting, the same portion of the overlap information for a portion of each frame in the same area of each frame of multiple subsequent frames during the presenting.