Data transmission method and apparatus, data decoding apparatus, and data recording medium

A data transmission apparatus adapted for carrying out transmission of video encoded data suitable for storage in a storage medium, the video encoded data includes intra-coded video data portions, the apparatus comprising:

• detecting means for detecting a first entry point in the video encoded data which corresponds to a position of a first intra-coded video data portion;
• packet generating means for generating, on the basis of the detected first entry point, at least one packet that includes position information relating to at least one second entry point and at least one additional information relating to the video encoded data, said second entry point exists in a forward direction or in a backward direction relative to the first entry point and corresponds to a position of at least one second intra-coded video data portion;
• and
• multiplexing means for multiplexing the packet at a predetermined position of the video encoded data, wherein the multiplexed video encoded data is suitable for selective high speed reproduction of the intra-coded video data portions.

A data decoding apparatus adapted decoding encoded video reproduction data which has been read out from a recording medium, the reproduction data including intra-coded video data portions, the apparatus comprising:

• separating means for separating, from the reproduction data, a first intra-coded video data portion corresponding to a first entry point and a packet including position information relating to at least one second entry point and at least one additional information relating to the reproduction data, said second entry portion exists in a forward direction or in a backward direction relative to the first entry point and corresponds to a position of a second intra-coded video data portion;
• decoding means for decoding the encoded reproduction data separated by the separating means;
• and
• control means for controlling a read-out position of the recording medium on the basis of the position information and the additional information at a time of a special high speed reproduction of the intra-coded video data portions.

A data recording medium on which video encoded data are recorded, the video encoded data includes intra-coded video data portions, the data recording medium being formed by the steps of:

• detecting a first entry point in the video encoded data which corresponds to a position or a first intra-coded video data portion;
• generating on the basis of the detected first entry point, at least one packet that includes position information relating to at least one second entry point and at least one additional information relating to the video encoded data, said second entry point exists in a forward direction or in a backward direction relative to the first entry point and corresponds to a position of at least one second intra-coded video data portion;
• multiplexing the packet at a predetermined position of the video encoded data;
• and
• recording the multiplexed data onto the recording medium, wherein the multiplexed video data is suitable for selective high speed reproduction of the intra-coded video data portions.