Reconfigurable remote control apparatus and method of using the same

• US 4,856,081 A
• Filed: 12/09/1987
• Issued: 08/08/1989
• Est. Priority Date: 12/09/1987
• Status: Expired due to Term

• Current Assignee: Philips Electronicsnorth America Corporation (Koninklijke Philips N.V.)
• Original Assignee: Philips Electronicsnorth America Corporation (Koninklijke Philips N.V.)
• Inventors: Smith, Bobby J.
• Primary Examiner(s): Griffin, Robert L.
• Assistant Examiner(s): KUNTZ, CURTIS A
• Application Number:
  US07/130,817
• Time in Patent Office: 608 Days
• Field of Search: 455/151, 455/603, 455/608, 455/352, 340/825.57, 340/825.69, 340/825.72, 340/825.34, 340/825.31, 358/194.1
• US Class Current: 455/151.4
• CPC Class Codes: G08C 19/28 using pulse code

Abstract

A reconfigurable remote control apparatus and method for capturing the signals of transmission devices of at least two different protocols are provided. Because transmission devices either output signal bursts of different lengths at a carrier frequency followed by pauses of different lengths, or pulses of a relatively constant length followed by pauses of different lengths, a first determination is made as to the type of system being captured. After the system type is determined, the carrier frequency and the burst and pause lengths are determined for a burst type system, while only the pause lengths are determined for a pulse-pause type system. The captured information is preferably compressed according to a preferred compression scheme which finds and stores all possible signal lengths and all permitted adjacent signal length combinations for a particular apparatus, and composes and stores a compressed code which acts as a pointer to the stored signal length combinations. A further aspect of the invention is that a user need only press the keys of the remote unit to be captured during the capturing sequence and is prompted to do so by the apparatus of the invention.

Claims

1. A reconfigurable remote control apparatus for use with a plurality of remotely controllable products at least one of which is responsive to signals of a different transmission protocol than another, said reconfigurable remote control apparatus comprising:

(a) receiver means for receiving during a capture mode signals transmitted from a remote control transmitters to be emulated, said signals comprising first protocol signals having pulses separated by pauses, and second protocol signals having bursts of pulses at a carrier frequency separated by pauses;

(b) distinguishing means connected to said receiver means for distinguishing between said first protocol signals and said second protocol signals and for providing an indication of the protocol used by each transmitter to be emulated;

(c) memory means;

(d) processing means connected to said receiver means for substantially determining at least the duration of said pauses and providing to said memory means first date representative thereof when said first protocol signals are received, and for substantially determining the carrier frequency and the duration of said pulse burst and pauses between pulse bursts and providing second data representative thereof when said second protocol signals are received;

(e) transmitter means for transmitting control signals corresponding to transmitter input signals applied thereto;

(f) user operable selector means for controlling said reconfigurable remote control apparatus; and

(g) transmitter control means connected to said memory means and said user operable selector means, for addressing said memory means in response to user activation of said selector means and causing data stored in said memory means to be sent to said transmitter means to constitute said transmitter input signals.

2. A reconfigurable remote control apparatus according to claim 1, wherein:

said distinguishing means, said processing means, and said transmitter control means constitute at least parts of a microprocessor.

3. A reconfigurable remote control apparatus according to claim 2, further comprising:

(h) data compression means for obtaining at least one of said pulse duration determination and said carrier frequency and pulse burst duration determination, compressing the obtained determinations, and provided compressed data to said memory means, wherein

said transmitter control means further includes means for expanding said compressed data into a format such that said transmitter means can transmit control signals corresponding to at least one of said determinations according to its corresponding protocol.

4. A reconfigurable remote control apparatus according to claim 2, further comprising:

(h) prompting means for prompting a user to initiate transmission of a signal from a remote control transmitter to be emulated, wherein said microprocessor means controls said prompting means.

5. A reconfigurable remote control apparatus according to claim 4, wherein:

said prompting means further includes a liquid crystal display.

6. A reconfigurable remote control apparatus according to claim 5, operable in at least a capture mode, wherein:

said reconfigurable remote control apparatus is operable in at least a capture mode, and

said liquid crystal display is a dot matrix liquid crystal display and said microprocessor means is arranged to cause said liquid crystal display to provide prompting information in a first orientation during the capture mode, and to cause said liquid crystal display to provide information other than prompting information in a second orientation.

7. A reconfigurable remote control apparatus according to claim 4, wherein:

said prompting means is arranged to control a television receiver such that prompting information is displayed on a television.

8. A reconfigurable remote control apparatus according to claim 1, wherein:

said memory means comprises a nonvolatile memory.

9. A reconfigurable remote control apparatus according to claim 4, operable in a capture mode for capturing infrared code of said remotely controllable products, and in an operate mode for operating said remotely controllable products, further comprising:

(h) capture switch means readable by said microprocessor for selecting one of said capture mode and said operate mode.

10. A reconfigurable remote control apparatus according to claim 9, wherein:

said user operable selector means comprises keyboard means for substantially emulating a keyboard of any one of the remote control transmitters to be emulated, and wherein

said prompting means further includes a liquid crystal display.

11. A reconfigurable remote control apparatus according to claim 4, wherein:

said microprocessor controls said prompting means to prompt a user to press any key of said transmitter to be emulated to permit said distinguishing means to determine the protocol of said transmitter to be emulated, and further to prompt a user to only press predetermined keys of said transmitter to be emulated in a predetermined order to permit said processing means to provide data repesentative thereof to said memory means.

12. A reconfigurable remote control apparatus according to claim 10, wherein:

said microprocessor controls said prompting means to prompt a user to press any key of said transmitter to be emulated to permit said distinguishing means to determine the protocol of said transmitter to be emulated, and further to prompt a user to only press predetermined keys of said transmitter to be emulated in a predetermined order to permit said processing means to provide data representative thereof to said memory means, and

said keyboard means includes at least one key programmed in said capture mode for instructing said microprocessor when pressed by a user to bypass the prompting of pressing of at least one key of said predetermined sequence.

13. A reconfigurable remote control apparatus for use with at least one remotely controllable product, said reconfigurable remote control apparatus comprising:

(a) receiver means for receiving during a capture mode signals transmitted from a remote control transmitter to be emulated, said signals comprising first protocol signals having pulses separated by pauses, and second protocol signals having bursts of pulses at a carrier frequency separated by pauses;

(b) distinguishing means connected to said receiver means for distinguishing between said first protocol signals and said second protocol signals and for providing an indication of the protocol used by said transmitter to be emulated;

(c) memory means comprising at least one of a RAM and a ROM for storing prompting information and for storing received data;

(d) processing means connected to said receiver means for substantially determining at least the duration of said pauses and providing to said memory means first data representative thereof when said first protocol signals are received, and for substantially determining the carrier frequency and the duration of said pulse burst and pauses between pulse bursts and providing second data representative thereof when said second protocol signals are received;

(e) transmitter means for transmitting control signals corresponding to transmitter input signals applied thereto;

(f) user operable selector means for controlling said reconfigurable remote control apparatus;

(g) transmitter control means connected to said memory means and said user operable selector means, for addressing said memory means in response to user activation of said selector means and causing data stored in said memory means to be sent to said transmitter means to constitute said transmitter input signals;

(h) prompting means for receiving prompting information from said memory means and for displaying said prompting information, wherein said prompting information is information which instructs a user to capture the key codes of the remote control transmitter to be emulated by pressing only the keys of the remote control transmitter to be emulated in a predetermined order.

14. A reconfigurable remote control apparatus according to claim 13, wherein:

said prompting information is information which instructs a user to capture all key codes of the remote control transmitter to be emulated by pressing all the keys of the remote control transmitter to be emulated in a predetermined order without pressing a key of said reconfigurable remote control apparatus.

15. A reconfigurable remote control apparatus according to claim 14, further comprising:

(i) keyboard means comprising at least one key programmed in said capture mode for causing said memory, when said keyboard means is pressed by a user, to accomplish at least one of a bypass and a repeat of at least a segment of said stored prompting information so as to cause said instructing information to accomplish at least one of skipping and repeating at least one key press instruction.

16. A reconfigurable remote control apparatus according to claim 13, wherein:

said prompting information further comprises information which prompts a user to press any key of said remote control transmitter to be emulated prior to prompting said user to press all the said keys in said predetermined order such that said distinguishing means can determine the protocol of said transmitter to be emulated prior to capturing the code of all of said keys of said remote control transmitter to be emulated.

17. A method of learning and storing the remote control signal codes of at least one remote control transmitter to be emulated by a reconfigurable remote control unit, said method comprising:

(a) receiving a first transmission signal from said remote control transmitter;

(b) determining whether the signal transmitted from said remote control transmitter is of a first protocol comprised of pulses separated by pauses or whether it is of a second protocol comprised of bursts of pulses at a carrier frequency separated by pauses, and generating and storing an indication of a said protocol determination;

(c) when said transmitted signal is comprised of bursts of pulses at a carrier frequency separated by pauses, determining said carrier frequency and generating and storing data representing said carrier frequency;

(d) receiving second transmission signals from said remote control transmitter, said second transmission signals comprising remote control signal codes; and

(e) determining the length of time of said pauses when said signals are pulses separated by pauses, and the duration of said pulse burst when said signals are bursts of pulses at a carrier frequency separated by pauses, and generating and storing data representing each of said second transmission signals.

18. A method according to claim 17, wherein:

said step of determining the transmission signal protocol further comprises sensing the number of cycles up to a predetermined threshold value received over a predetermined length of time from said remote control transmitter.

19. A method according to claim 18, wherein:

when said sensed number of cycles reaches said predetermined threshold value, said carrier frequency is determined by dividing the threshold value by the length of time required to reach said predetermined threshold.

20. A method according to claim 17, further comprising:

(f) upon command of a user upon said control unit to control a transmitter, accessing at least the data representing the transmission signal code for the corresponding transmitter, and expanding the accessed code to emulate the desired transmission signal.

21. A method according to claim 20, wherein

said step of accessing at least the data representing the transmission signal code further includes accessing said indication of protocol determination and said data representing said carrier frequency when said transmission signal to be emulated is comprised of bursts of pulses at a carrier frequency separated by pauses.

22. A method according to claim 17, further comprising:

(f) providing a means for prompting a user to send

said first transmission signal from said transmitter to said unit by pressing any key of said transmitter, where said unit is arranged to receive and process said first transmission signal, and

said second transmission signals in a predetermined sequence by pressing in a predetermined sequence predetermined keys of said transmitter only, where said unit is arranged to receive and process said second transmission signals.