Abstract: The present disclosure relates to an imaging device, a control method, and a program that make it possible to cope with various cases in which a plurality of communication standards is assumed to be mixed. A communication unit performs communication according to a first communication standard and a second communication standard. A communication compatibility processing unit performs communication compatibility processing necessary for maintaining communication compatibility in a case where an imaging system is assumed, the imaging system mixedly including a first external flash supporting only the first communication standard and a second external flash supporting both the first communication standard and the second communication standard. The present technology can be applied to, for example, an imaging system including an imaging device and an external flash.

Abstract: The present disclosure relates to an imaging system, a control method, and a program capable of optimizing a release time lag. An external flash transmits a light emission preparation time from when reception of a light emission command is completed until when a light emission trigger is acceptable. An imaging device communicates with the external flash, acquires the light emission preparation time, and optimizes an output timing of the light emission trigger on the basis of the light emission preparation time. The present technology is applicable to, for example, an imaging system including an external flash and an imaging device.

Abstract: The present disclosure relates to an imaging system, a control method, and a program that make it possible to implement setting for an external flash by an operation on a camera side. Setting coordination processing is executed in which: setting information of an external flash (13) is transmitted and received between a first communication unit (67A) and a second communication unit (47); a second display unit is caused to display a setting screen to be used for setting a setting item of the external flash; and the setting information changed by an operation on the second operation unit is caused to be transmitted from the imaging device (12) to the external flash (13) via the first communication unit (67A) and the second communication unit (47), and a setting for the external flash (13) is caused to be applied. The present technology can be applied to, for example, an imaging system (11) including an external flash (13) and an imaging device (12).

Abstract: The purpose of the present invention is to reduce the number of components of an external device to reduce the cost of the external device. The electronic device according to the present technique is provided with: a battery installed unit in which a secondary battery is installed; a charging unit for charging the secondary battery on the basis of an external input power; and a connection unit for electrically connecting an external device in which a secondary battery is installed. The secondary battery installed in the external device is charged by means of the charging unit via the connection unit.

Abstract: The purpose of the present invention is to reduce the number of components of an external device to reduce the cost of the external device. The electronic device according to the present technique is provided with: a battery installed unit in which a secondary battery is installed; a charging unit for charging the secondary battery on the basis of an external input power; and a connection unit for electrically connecting an external device in which a secondary battery is installed. The secondary battery installed in the external device is charged by means of the charging unit via the connection unit.

Abstract: An information processing system includes: a data processing unit that executes verification processing for a content recorded in a disk and reproduces the disk-recorded content under a condition that the verification succeeds, wherein the data processing unit randomly selects hash units, which are objects of collation, from among a plurality of hash units formed with component data items of the content, reads the selected hash units sequentially from the disk, calculates hash values, and collates the calculated hash values with collation hash values; and the data processing unit executes reading sequence determination processing so as to determine a reading sequence in which the selected hash units are sorted according to recording positions in a disk, and reads the selected hash units according to the determined reading sequence.

Abstract: An information processing system includes: a data processing unit that executes verification processing for a content recorded in a disk and reproduces the disk-recorded content under a condition that the verification succeeds, wherein the data processing unit randomly selects hash units, which are objects of collation, from among a plurality of hash units formed with component data items of the content, reads the selected hash units sequentially from the disk, calculates hash values, and collates the calculated hash values with collation hash values; and the data processing unit executes reading sequence determination processing so as to determine a reading sequence in which the selected hash units are sorted according to recording positions in a disk, and reads the selected hash units according to the determined reading sequence.