Synchronized reproduction system and synchronized reproduction method

A synchronized reproduction system having at least one image reproduction device reproducing an image based on multimedia data including image data and sound data, and a sound reproduction device reproducing sound based on the multimedia data,

• the sound reproduction device including:
• a first reception section which receives the multimedia data from an information provision device via a first transmission channel;
• a first separation section which separates the sound data from the multimedia data;
• a synchronization data generation section which generates synchronization data based on the sound data;
• and
• a synchronization data transmission section which transmits the synchronization data to the image reproduction device via a second transmission channel differing from the first transmission channel;
• and
• the image reproduction device including:
• a second reception section which receives the multimedia data from the information provision device via the first transmission channel;
• a second separation section which separates the image data from the multimedia data;
• a storage section which stores the image data;
• a synchronization data reception section which receives the synchronization data via the second transmission channel;
• and
• a matching section which determines reproduction target image data based on the synchronization data, wherein
• the multimedia data is divided into a plurality of packets and transmitted by the information provision device;
• the synchronization data includes pattern data indicating packet identification information;
• and
• the matching section determines the reproduction target image data based on the packet identification information.

A synchronized reproduction method using at least one image reproduction device reproducing an image based on multimedia data including image data and sound data, the at least one image reproduction device having a storage section and a matching section, and a sound reproduction device reproducing sound based on the multimedia data, the method comprising steps of:

• causing the sound reproduction device to:
• receive the multimedia data from an information provision device via a first transmission channel;
• separate the sound data from the multimedia data;
• generate synchronization data based on the sound data;
• and
• transmit the synchronization data to the image reproduction device via a second transmission channel differing from the first transmission channel;
• and
• causing the image reproduction device to:
• receive the multimedia data from the information provision device via the first transmission channel;
• separate the image data and the sound data from the multimedia data;
• store the image data and the sound data;
• receive the synchronization data via the second transmission channel;
• determine corresponding sound data from among the stored sound data based on the synchronization data;
• and
• determine reproduction target image data corresponding to the determined sound data from among the stored image data, wherein
• the synchronization data includes pattern data indicating part of the sound data, and
• the matching section determines corresponding sound data from among the sound data stored in the storage section based on the pattern data.

A synchronized reproduction method using at least one image reproduction device reproducing an image based on multimedia data including image data and sound data, and a sound reproduction device reproducing sound based on the multimedia data, the method comprising steps of:

• causing the sound reproduction device to:
• receive the multimedia data from an information provision device via a first transmission channel;
• separate the sound data from the multimedia data;
• generate synchronization data based on the sound data;
• and
• transmit the synchronization data to the image reproduction device via a second transmission channel differing from the first transmission channel;
• and
• causing the image reproduction device to:
• receive the multimedia data from the information provision device via the first transmission channel;
• separate the image data from the multimedia data;
• store the image data;
• receive the synchronization data via the second transmission channel;
• and
• determine reproduction target image data based on the synchronization data, wherein
• the multimedia data is divided into a plurality of packets and transmitted by the information provision device;
• the synchronization data includes pattern data indicating packet identification information;
• and
• the reproduction target image data is determined based on the packet identification information.