Abstract: A message transmitting signal comprised of a sequence of high level and low level pulses arranged to provide a message, such as the IR bit pattern output by a remote control device, is analysed. Distinct durations during which pulses are at a high level are formed into a first table and distinct durations during which the pulses are at low level are formed into a second table. An index is linked to the first and second tables, the index identifying the order, level and distinct duration of the pulses in the signal. The index can be categorised to identify the protocol of the message and can be used to recognise protocols and, in a universal remote control device, to generate message transmitting signals.

Abstract: A universal remote control device (100) is provided which is able to operate different electronic devices such as television sets, recorders, set top boxes, and audio systems. The universal remote control device (100) is provided with a database (10) in which control data collected from a plurality of individual physical remote control units (2) is stored in a structured manner. To enable the memory storing the database (10) to be kept small, repetitious and/or redundant control data is omitted. In addition, the database structure uses a hierarchical structure and inheritance. The control data of a physical remote in memory may be stored, therefore, in part in a child physical remote and also in one or more parent or grandparent virtual remotes. Such a structure enables control information which is common to a number of remotes to be stored in just a single occurrence.

Abstract: A message transmitting signal comprised of a sequence of high level and low level pulses arranged to provide a message, such as the IR bit pattern output by a remote control device, is analysed. Distinct durations during which pulses are at a high level are formed into a first table and distinct durations during which the pulses are at low level are formed into a second table. An index is linked to the first and second tables, the index identifying the order, level and distinct duration of the pulses in the signal. The index can be categorised to identify the protocol of the message and can be used to recognise protocols and, in a universal remote control device, to generate message transmitting signals.

Abstract: A universal remote control device (100) is provided which is able to operate different electronic devices such as television sets, recorders, set top boxes, and audio systems. The universal remote control device (100) is provided with a database (10) in which control data collected from a plurality of individual physical remote control units (2) is stored in a structured manner. To enable the memory storing the database (10) to be kept small, repetitious and/or redundant control data is omitted. In addition, the database structure uses a hierarchical structure and inheritance. The control data of a physical remote in memory may be stored, therefore, in part in a child physical remote and also in one or more parent or grandparent virtual remotes. Such a structure enables control information which is common to a number of remotes to be stored in just a single occurrence.