Reproduction system for maintaining synchronization between a first audio content and a plurality of audio contents during special reproduction of the first audio content, and method and program thereof

1. A reproduction system, comprising:

a special reproduction instruction section configured to, during normal reproduction of a plurality of contents having periodicity where the plurality of con tents are reproduced in synchronization and with a predetermined cycle, generate an instruction to perform special reproduction on a first content of the plurality of contents to disturb periodicity of the first content with respect to other contents of the plurality of contents being reproduced;

a special reproduction process section that performs the special reproduction on the first content based on an instruction from the special reproduction instruction section; and

a return process section that matches a normal reproduction return position of the first content that is subject to the special reproduction, with a position corresponding to a timing of the cycle of the other contents that are not subject to the special reproduction, upon occurrence of a cancellation of the special reproduction,

wherein the return process section

judges a reproduction position Ts of the first content at a time of the occurrence of the cancellation of the special reproduction of the first content,

judges a reproduction position Tbg of the other contents at the time of the occurrence of the cancellation of the special reproduction of the first content, and

determines the normal reproduction return position from any one of

i) a return position candidate A as an in-cycle position Ubg indicating a position in a cycle of the reproduction position Tbg existing just before the reproduction position Ts,

ii) a return position candidate B as an in-cycle position Ubg existing just after the reproduction position Ts,

iii) a return position candidate C corresponding to one of the return candidates A or B that is closer to the reproduction position Ts, and

iv) a return position candidate D corresponding to one of the return candidates A or B that is included in the cycle where the reproduction position Ts belongs to; and

a return section that matches a reproduction position of the first content reproduced in special reproduction with the determined normal reproduction return position.

2. A reproduction system, comprising:

a special reproduction instruction section configured to, during normal reproduction of a plurality of contents having periodicity where the plurality of contents are reproduced in synchronization and with a predetermined cycle, generate an instruction to perform special reproduction on a first content of the plurality of contents to disturb periodicity of the first content with respect to other contents of the plurality of contents being reproduced;

a special reproduction process section that performs the special reproduction on the first content based on an instruction from the special reproduction instruction section;

a return process section that matches a normal reproduction return position of the first content that is subject to the special reproduction, with a position corresponding to a timing of the cycle of the other contents that are not subject to the special reproduction, upon occurrence of a cancellation of the special reproduction; and

a return target position assignment section that assigns an arbitrary position Tr in the first content as a return target position,

wherein the return process section

judges a reproduction position Tbg of the other contents at a time of the occurrence of cancellation of the special reproduction, and

determines the normal reproduction return position from either one of four candidates of

i) a return position candidate A as an in-cycle position Ubg indicating a position of a cycle of the reproduction position Tbg existing just before the arbitrary position Tr,

ii) a return position candidate B as an in-cycle position Ubg existing just after the arbitrary position Tr,

iii) a return position candidate C corresponding to one of the return candidates A or B that is closer to the arbitrary position Tr, and

iv) a return position candidate D corresponding to one of the return candidates A or B that is included in the cycle where the arbitrary position Tr belongs to; and

a return section that adjusts a reproduction position of the first content reproduced in special reproduction to the determined normal reproduction return position.

3. A non-transitory computer-readable medium having stored thereon executable program code that, upon being read and executed by a processor device of a computer, causes the computer to function as:

a special reproduction instruction section configured to, during normal reproduction of a plurality of contents having periodicity where the plurality of contents are reproduced in synchronization and with a predetermined cycle, generate an instruction to perform special reproduction on a first content of the plurality of contents to disturb periodicity of the first content with respect to other contents of the plurality of contents being reproduced;

a special reproduction process section that performs the special reproduction on the first content based on an instruction from the special reproduction instruction section; and

a return process section that matches a normal reproduction return position of the first content that is subject to the special reproduction, with a position corresponding to a timing of the cycle of the other contents that are not subject to the special reproduction, upon occurrence of a cancellation of the special reproduction,

wherein the return process section

judges a reproduction position Ts of the first content at a time of the occurrence of the cancellation of the special reproduction of the first content,

judges a reproduction position Tbg of the other contents at the time of the occurrence of the cancellation of the special reproduction of the first content, and

determines the normal reproduction return position from any one of

i) a return position candidate A as an in-cycle position Ubg indicating a position in a cycle of the reproduction position Tbg existing just before the reproduction position Ts,

ii) a return position candidate B as an in-cycle position Ubg existing just after the reproduction position Ts,

iii) a return position candidate C corresponding to one of the return candidates A or B that is closer to the reproduction position Ts, and

iv) a return position candidate D corresponding to one of the return candidates A or B that is included in the cycle where the reproduction position Ts belongs to; and

a return section that matches a reproduction position of the first content reproduced in special reproduction with the determined normal reproduction return position.

4. A non-transitory computer-readable medium having stored thereon executable program code that, upon being read and executed by a processor device of a computer, causes the computer to function as:

a special reproduction instruction section configured to, during normal reproduction of a plurality of contents having periodicity where the plurality of contents are reproduced in synchronization and with a predetermined cycle, generate an instruction to perform special reproduction on a first content of the plurality of contents to disturb periodicity of the first content with respect to other contents of the plurality of contents being reproduced;

a special reproduction process section that performs the special reproduction on the first content based on an instruction from the special reproduction instruction section;

a return process section that matches a normal reproduction return position of the first content that is subject to the special reproduction, with a position corresponding to a timing of the cycle of the other contents that are not subject to the special reproduction, upon occurrence of a cancellation of the special reproduction; and

a return target position assignment section that assigns an arbitrary position Tr in the first content as a return target position,

wherein the return process section

judges a reproduction position Tbg of the other contents at a time of the occurrence of cancellation of the special reproduction, and

determines the normal reproduction return position from either one of four candidates of

i) a return position candidate A as an in-cycle position Ubg indicating a position of a cycle of the reproduction position Tbg existing just before the arbitrary position Tr,

ii) a return position candidate B as an in-cycle position Ubg existing just after the arbitrary position Tr,

iii) a return position candidate C corresponding to one of the return candidates A or B that is closer to the arbitrary position Tr, and

iv) a return position candidate D corresponding to one of the return candidates A or B that is included in the cycle where the arbitrary position Tr belongs to; and

a return section that adjusts a reproduction position of the first content reproduced in special reproduction to the determined normal reproduction return position.