Method and apparatus for recording data on a recording disc, and method and apparatus for restoring data recorded on a recording disc

A method of recording data on a recording disc, comprising the steps of:

• (a) generating a program stream from input video data;
• (b) sequentially generating video object units from the program stream generated by the step (a), the generated video object units having navigation portions respectively and composing video objects, the navigation portions being void of ending time information and search information;
• (c) sequentially recording the video object units generated by the step (b) on the recording disc without buffering the video object units;
• (d) detecting ending time information and search information from the program stream generated by the step (a);
• (e) deciding whether or not the step (c) has completed the recording of video object units composing one video object;
• (f) generating navigation information which includes the ending time information and the search information detected by the step (d), and which corresponds to the last video object recognized by the step (e);
• and
• (g) recording the navigation information generated by the step (f) on zones in the recording disc which correspond to the navigation portions of the video object units composing the last video object recognized by the step (e) each time the step (e) decides that the step (c) has completed the recording of video object units composing one video object.

An apparatus for recording data on a recording disc according to the DVD-Video standards, comprising:

• a first generator for generating a program stream from input video data;
• a second generator for sequentially generating video object units from the program stream generated by the first generator, the generated video object units having navigation portions respectively and composing video objects, the generated video object units having video data portions or audio data portions, the navigation portions storing first navigation information void of ending time information and search information;
• a first recorder for sequentially recording the video object units generated by the second generator on the recording disc without buffering the video object units;
• a detector for detecting ending time information and search information from the program stream generated by the first generator;
• a deciding device for deciding whether or not the first recorder has completed the recording of video object units composing one video object;
• a third generator for generating second navigation information which includes the ending time information and the search information detected by the detector, and which corresponds to the last video object recognized by the deciding device;
• and
• a second recorder for writing the second navigation information generated by the third generator over the recorded first navigation information in zones in the recording disc which correspond to the navigation portions of the video object units composing the last video object recognized by the deciding device each time the deciding device decides that the first recorder has completed the recording of video object units composing one video object.

A method of recording data on a recording disc according to the DVD-Video standards, comprising the steps of:

• (a) generating a program stream from input video data;
• (b) sequentially generating video object units from the program stream generated by the step (a), the generated video object units having navigation portions respectively and composing video objects, the generated video object units further having video data portions or audio data portions, the navigation portions storing first navigation information void of ending time information and search information;
• (c) sequentially recording the video object units generated by the step (b) on the recording disc without buffering the video object units;
• (d) detecting ending time information and search information from the program stream generated by the step (a);
• (e) deciding whether or not the step (c) has completed the recording of video object units composing one video object;
• (f) generating second navigation information which includes the ending time information and the search information detected by the step (d), and which corresponds to the last video object recognized by the step (e);
• and
• (g) writing the second navigation information generated by the step (f) over the recorded first navigation information in zones in the recording disc which correspond to the navigation portions of the video object units composing the last video object recognized by the step (e) each time the step (e) decides that the step (c) has completed the recording of video object units composing one video object.