Video data storage and playback scheme with automatic playback continuation after overtaking

A method for controlling a storage device for storing digital video data and reading stored video data and transmitting read out video data to a playback device for playbacking video data, in response to a request from the playback device, the method comprising the steps of:

• (a) controlling the storage device to carry out a video data reading and transmission processing in a mode specified from the playback device;
• and
• (b) controlling the storage device to interrupt video data reading and transmit an overtaking notice to the playback device, then read out video data written into the storage device after the overtaking notice, in an ordinary mode, and then transmit read out video data after an occurrence of an overtaking to the playback device and attaching control data having a prescribed value indicating that it is video data read out after the overtaking occurred, when the overtaking, in which a reading position of video data in a process of being read out from the storage device in response to the request from the playback device overtook a writing position of video data in a process of being written into the storage device, occurred during the video data reading and transmission processing of the step (a).

A method for controlling a playback device for playbacking video data received from a storage device by making a request to the storage device storing digital video data, the method comprising the steps of:

• (a) controlling the playback device to carry out a video data playback processing in a mode specified from a user;
• and
• (b) controlling the playback device to interrupt video data playback after playbacking video data remaining in buffer memories of the storage device and the playback device upon receiving an overtaking notice from the storage device during the video data playback processing of the step (a), the overtaking notice indicating an occurrence of an overtaking in which a reading position of video data in a process of being read out from the storage device in response to the request from the playback device overtook a writing position of video data in a process of being written into the storage device, and then resume video data playback in an ordinary playback mode upon detecting receiving of video data read out after the occurrence of the overtaking from the storage device according to control data having a prescribed value indicating that it is video data read out after the overtaking occurred, which is attached to video data received from the storage device.

A storage device for storing digital video data and reading stored video data and transmitting read out video data to a playback device for playbacking video data, in response to a request from the playback device, the storage device comprising:

• a reading and transmission unit for carrying out a video data reading and transmission processing in a mode specified from the playback device;
• and
• an overtaking processing unit for interrupting video data reading and transmitting an overtaking notice to the playback device, then reading out video data written into the storage device after the overtaking notice, in an ordinary mode, and then transmitting read out video data after an occurrence of an overtaking to the playback device by attaching control data having a prescribed value indicating that it is video data read out after the overtaking occurred, when the overtaking, in which a reading position of video data in a process of being read out from the storage device in response to the request from the playback device overtook a writing position of video data in a process of being written into the storage device, occurred during the video data reading and transmission processing by the reading and transmission unit.

A playback device for playbacking video data received from a storage device by making a request to the storage device storing digital video data, the playback device comprising:

• a playback processing unit for carrying out a video data playback processing in a mode specified from a user;
• and
• an overtaking processing unit for interrupting video data playback after playbacking video data remaining in buffer memories of the storage device and the playback device upon receiving an overtaking notice from the storage device during the video data playback processing of the playback processing unit, the overtaking notice indicating an occurrence of an overtaking in which a reading position of video data in a process of being read out from the storage device in response to the request from the playback device overtook a writing position of video data in a process of being written into the storage device, and then resuming video data playback in an ordinary playback mode upon detecting receiving of video data read out after the occurrence of the overtaking from the storage device according to control data having a prescribed value indicating that it is video data read out after the overtaking occurred, which is attached to video data received from the storage device.