Patent attributes
A recording and reproducing apparatus for recording a video signal on an optical disc using a video recording (VR) format and for reproducing the optical disc in which the video signal is recorded in the VR format, the recording and reproducing apparatus includes an extension information recording means for generating extension information including character string information representing an input character string and correspondence information representing an object to which that the character string corresponds, and for recording the extension information on the optical disc. An upper limit of a number of characters of the character string represented by the character string information is made to be limitless, while a program and a cell in an original program chain, and a program and a cell in a user-defined program chain are included in the object to be corresponded by means of the correspondence information.
