Picture signal coding method, decoding method and picture signal recording medium

A picture signal recording method, comprising the steps of:

• coding an input picture signal to produce a coded picture signal which includes intra-coded picture signals, predictive-coded picture signals, and bi-directionally predictive-coded picture signals;
• dividing the coded picture signal into coded picture signals for high speed reproduction and other coded picture signals, the coded picture signals for high speed reproduction including intra-coded picture signals and at least one predictive-coded picture signal;
• successively arranging the coded picture signals for high speed reproduction and the other coded picture signals at a predetermined ratio to produce a recording signal;
• and
• recording the recording signal onto a recording medium.

A picture signal recording method, comprising the steps of:

• coding an input picture signal to produce a coded picture signal, the coded picture signal including intra-frame coded picture signals, predictive coded picture signals, and bi-directional predictive coded picture signals;
• dividing the coded picture signal into coded picture signals of a high priority degree and coded picture signals of a low priority degree, the coded picture signals of a high priority degree including at least portions of the intra-frame coded picture signals and at least portions of at least one of the predictive-coded picture signals and the coded picture signals of a low priority degree including at least other portions of the intracoded picture signals and at least other portions of the at least one predictive-coded picture signals;
• producing a recording signal of a packet construction such that the coded picture signals of a high priority degree and the coded picture signals of a low priority degree are not present in a same packet;
• and
• recording the recording signal onto a recording medium.

A picture signal reproduction method, comprising the steps of:

• reproducing a coded picture signal from a recording medium on which the coded picture signal is recorded, the coded picture signal including intra-frame coded picture signals, predictive coded picture signals, and bi-directional predictive coded picture signals and the coded picture signal being recorded on the recording medium such that coded picture signals for high speed reproduction in a predetermined picture unit and other coded picture signals in the predetermined picture unit are disposed so that the coded picture signals for high speed reproduction are positioned at the beginning of the predetermined picture unit, the coded picture signals for high speed reproduction including the intra-frame coded picture signals and at least one of the predictive-coded picture signals;
• separating the coded picture signal into the coded picture signals for high speed reproduction and the other coded picture signals;
• re-arranging the coded picture signals for high speed reproduction and the other coded picture signals thus separated in a predetermined order to produce a rearranged signal;
• and
• decoding the re-arranged signal to produce a decoded picture for ordinary reproduction.

A picture signal reproduction method, comprising the steps of:

• reproducing, from a recording medium, a sector of the recording medium to which coded picture signals for high speed reproduction are allocated, a coded picture signal including intra-frame coded picture signals, predictive coded picture signals, and bi-directional predictive coded picture signal recorded on the recording medium such that coded picture signals for high speed reproduction and other coded picture signals are successively arranged on the recording medium at a predetermined ratio and the coded picture signal has a predetermined amount of codes allocated to each sector, the coded picture signals for high speed reproduction including the intra-frame coded picture signals and at least one predictive coded picture signal;
• separating, in response to a signal in a subcode of the sector representative of a beginning address of the coded picture signals for high speed reproduction, the coded picture signals of the sector for high speed reproduction from the other coded picture signals of the sector;
• and
• decoding the thus separated coded picture signals for high speed reproduction to produce a decoded picture for high speed reproduction.

A picture signal reproduction method, comprising the steps of:

• reproducing a coded picture signal from a recording medium, the coded picture signal including intra-frame coded picture signals, predictive coded picture signals, and bi-directional predictive coded picture signals, the coded picture signal recorded on the recording medium having been divided into coded picture signals of a high priority degree and coded picture signals of a low priority degree the coded picture signals of the high priority degree and the coded picture signals of the low priority degree having been recorded on the recording medium in a packet construction such that the coded picture signals of a high priority degree and the coded picture signals of a low priority degree do not exist in a same packet, the coded picture signals of the high priority degree including at least portions of the intra-frame coded picture signals and at least portions of at least one of the predictive-coded picture signals and the coded picture signals of the low priority degree including at least other portions of the intra-coded picture signals and at least other portions of the at least one predictive-coded picture signals;
• separating the coded picture signals of a high priority degree and the coded picture signals of a low priority degree from each other in response to an identification signal provided in a header of the packet and that identifies whether the coded signals in the packet are the coded picture signals of a high priority degree or the coded picture signals of a low priority degree;
• and
• decoding only the coded picture signals of a high priority degree upon high speed reproduction.

A picture signal reproduction method, comprising the steps of:

• reproducing a coded picture signal from a recording medium, the coded picture signal including intra-frame coded picture signals, predictive coded picture signals, and bi-directional predictive coded picture signals, the coded picture signal recorded on the recording medium having been divided into coded picture signals of a high priority degree and coded picture signals of a low priority degree the coded picture signals of the high priority degree and the coded picture signals of the low priority degree having been recorded on the recording medium in a packet construction such that the coded picture signals of a high priority degree and the coded picture signals of a low priority degree do not exist in a same packet, the coded picture signals of a high priority degree including at least portions of the intra-frame coded picture signals and at least portions of at least one of the predictive-coded picture signals and the coded picture signals of the low priority degree including at least other portions of the intra-coded picture signals and at least other portions of the at least one predictive-coded picture signals;
• separating the coded picture signals of a high priority degree and the coded picture signals of a low priority degree from each other in response to an identification signal provided in a header of the packet and that identifies whether the coded picture signals in the packet are the coded picture signals of a high priority degree or the coded picture signals of a low priority degree;
• combining the coded picture signals of a high priority degree and the coded picture signals of a low priority degree in response to a link signal provided in the header of the packet to produce a combination signal;
• and
• decoding the combination signal to produce a decoded picture signal for ordinary reproduction.

A picture signal recording apparatus, comprising:

• coding means for coding an input picture signal to produce a coded picture signal, the coded picture signal including intra-frame coded picture signals, predictive coded picture signals, and bi-directional predictive coded picture signals;
• division means for dividing the coded picture signal into coded picture signals for high speed reproduction and other coded picture signals, the coded picture signals for high speed reproduction including the intra-frame coded picture signals and at least one of the predictive-coded picture signals;
• multiplexing means for arranging the coded picture signals for high speed reproduction and other coded picture signals within each group-of-pictures so that the coded picture signals for high speed reproduction in the group-of-pictures are positioned at the beginning of the group-of-pictures to produce a recording signal;
• and
• recording means for recording the recording signal onto a recording medium.

A picture signal recording apparatus, comprising:

• coding means for coding an input picture signal to produce a coded picture signal which includes intra-coded picture signals, predictive-coded picture signals, and bi-directionally predictive-coded picture signals;
• division means for dividing the coded picture signal into coded picture signals tier high speed reproduction and other coded picture signals, the coded picture signals for high speed reproduction including intra-coded picture signals and at least one predictive-coded picture signal;
• multiplexing means for successively arranging the coded picture signals for high speed reproduction and the other coded picture signals at a predetermined ratio to produce a recording signal;
• and
• recording means for recording the recording signal onto a recording medium.

A picture signal recording apparatus, comprising:

• coding means for coding an input picture signal to produce a coded picture signal, the coded picture signal including intra-frame coded picture signals, predictive coded picture signals, and bi-directional predictive coded picture signals;
• division means for dividing the coded picture signal into coded picture signals of a high priority degree and coded picture signals of a low priority degree, the coded picture signals of a high priority degree including at least portions of the intra-frame coded picture signals and at least portions of at least one of the predictive-coded picture signals, and the coded picture signals of the low priority degree including at least other portions of the intra-coded picture signals and at least other portions of the at least one predictive-coded picture signals;
• multiplexing means for producing a recording signal of a packet construction such that the coded picture signals of a high priority degree and the coded picture signals of a low priority degree are not present in a same packet;
• and
• recording means for recording the recording signal onto a recording medium.

A picture signal reproduction apparatus, comprising:

• reproduction means for reproducing, a coded picture signal from a recording medium on which the coded picture signal is recorded, the coded picture signal including intra-frame coded picture signals, predictive coded picture signals, and bi-directional predictive coded picture signals and the coded picture signal being recorded on the recording medium such that coded picture signals for high speed reproduction in a predetermined picture unit and other coded picture signals in the predetermined picture unit are disposed so that the coded picture signals for high speed reproduction are positioned at the beginning of the predetermined picture unit, the coded picture signals for high speed reproduction including the intra-frame coded picture signals and at least one of the predictive-coded picture signals;
• separation means for separating the coded picture signal into the coded picture signals for high speed reproduction and the other coded picture signals;
• means for re-arranging the coded picture signals for high speed reproduction and the other coded picture signals thus separated in a predetermined order to produce a re-arranged signal;
• and
• decoding means for decoding the re-arranged signal to produce a decoded picture for ordinary reproduction.

A picture signal reproduction apparatus, comprising:

• reproduction means for reproducing a coded picture signal from a recording medium on which the coded picture signal is recorded, the coded picture signal including intra-frame coded picture signals, predictive coded picture signals, and bi-directional predictive coded picture signals and the coded picture signals for high speed reproduction including the intra-frame coded picture signals and at least one of the predictive-coded picture signals, the coded picture signal being recorded on the recording medium such that the coded picture signals for high speed reproduction and the other coded picture signals are successively arranged at a predetermined ratio and the coded picture signal is allocated for each predetermined amount of codes to each sector, a sector to which the coded picture signals for high speed reproduction are allocated;
• separation means for separating, in response to a signal representative of a top address of the coded picture signals for high speed reproduction in a subcode of the sector, the coded picture signals for high speed reproduction from the other coded picture signals thus reproduced from the sector;
• and
• decoding means for decoding the thus separated coded picture signals for high speed reproduction to produce a decoded picture for high speed reproduction.

A picture signal reproduction apparatus, comprising:

• reproduction means for reproducing a coded picture signal from a recording medium, the coded picture signal including intra-frame coded picture signals, predictive coded picture signals, and bi-directional predictive coded picture signals, the coded picture signal recorded on the recording medium having been divided into coded picture signals of a high priority degree and coded picture signals of a low priority degree, the coded picture signals of a high priority degree and the coded picture signals of a low priority degree having been recorded in a packet construction such that the coded picture signals of a high priority degree and the coded picture signals of a low priority degree do not exist in a same packet;
• separation means for separating the coded picture signals of a high priority degree and the coded picture signals of a low priority degree from each other in response to an identification signal provided in a header of the packet and that identifies whether the coded picture signals in the packet are the coded picture signals of a high priority degree or the coded picture signals of a low priority degree;
• and
• decoding means for decoding only the coded picture signals of a high priority degree upon high speed reproduction.

A picture signal reproduction apparatus, comprising:

• reproduction means for reproducing a coded picture signal from a recording medium, the coded picture signal including intra-frame coded picture signals, predictive coded picture signals, and bi-directional predictive coded picture signals, the coded picture signal recorded on the recording medium having been divided into coded picture signals of a high priority degree and coded picture signals of a low priority degree, the coded picture signals of a high priority degree and the coded picture signals of a low priority degree having been recorded in a packet construction such that the coded picture signals of a high priority degree and the coded picture signals of a low priority degree do not exist in a same packet;
• separation means for separating the coded picture signals of a high priority degree and the coded picture signals of a low priority degree from each other in response to an identification signal provided in a header of the packet and which identifies whether the coded picture signals within the packet are the coded picture signals of a high priority degree or the coded picture signals of a low priority degree;
• means for combining the coded picture signals of a high priority degree and the coded picture signals of a low priority degree in response to a link signal provided in the header of the packet to produce a combination signal;
• and
• decoding means for decoding the combination signal to produce a decoded picture signal for ordinary reproduction.

A picture signal recording medium, having data recorded thereon formed by the steps of:

• coding an input picture signal to produce a coded picture signal, the coded picture signal including intra-frame coded picture signals, predictive coded picture signals, and bi-directional predictive coded picture signals;
• dividing the coded picture signal into coded picture signals for high speed reproduction and other coded picture signals, the coded picture signals for high speed reproduction including the intra-frame coded picture signals and at least one of the predictive-coded picture signals;
• arranging the coded picture signals for high speed reproduction and the other coded picture signals within each group-of-pictures so that the coded picture signals for high speed reproduction in the group-of-pictures are positioned at the beginning of the predetermined group-of-pictures to produce a recording signal;
• and
• recording the recording signal onto the recording medium.

A picture signal recording medium, having data recorded thereon formed by the steps of:

• coding an input picture signal to produce a coded picture signal, the coded picture signal including intra-frame coded picture signals, predictive coded picture signals, and bi-directional predictive coded picture signals;
• dividing the coded picture signal into coded picture signals for high speed reproduction and other coded picture signals, the coded picture signals for high speed reproduction including the intra-frame coded picture signals and at least one of the predictive-coded picture signals;
• successively arranging the coded picture signals for high speed reproduction and the other coded picture signals at a predetermined ratio to produce a recording signal;
• and
• recording the recording signal onto a recording medium.

A picture signal recording medium, formed by the steps of:

• coding an input picture signal to produce a coded picture signal, the coded picture signal including intra-frame coded picture signals, predictive coded picture signals, and bi-directional predictive coded picture signals;
• dividing the coded picture signal into coded picture signals of a high priority degree and coded picture signals of a low priority degree, the coded picture signals of a high priority degree including at least portions of the intra-frame coded picture signals and at least portions of at least one of the predictive-coded picture signals and the coded picture signals of a low priority degree including at least other portions of the intra-coded picture signals and at least other portions of the at least one predictive-coded picture signals;
• producing a recording signal of a packet construction such that the coded picture signals for high speed reproduction and the other coded picture signals are not present in a same packet;
• and
• recording the recording signal onto a recording medium.