Abstract: A radio receiver having switching-over to traffic announcement wherein the bass and treble frequency responses and the volume are changed to a value which is subjectively optimum for the respective actual driver and the announcement becomes more pleasant and easier to understand for him/her without the necessity for the driver to manually change the bass and treble controls. The switching-over of the bass and treble audio frequencies preferably occurs a short time before the switching-over of the announcement. Additionally, further switchings-over can be carried out which are advantageous for the attention of the driver. For example, switching off acoustically disturbing devices such as fans.

Abstract: A technique for providing volume adjustment capabilities in a digital telecommunication system. A composite two-part address is applied to a memory which stores amplitude adjusted digital voice words. The first part of the address comprises the digital voice word carried by the TDM time slot. The second part of the address comprises a parameter which defines the extent of amplitude adjustment. The readout of the memory thereby defines a different digital voice word having a desired amplitude level. The second address part of the composite address is generated by an amplitude parameter memory in synchronism with each time slot so that the amplitude of the digital voice words in corresponding time slots can be adjusted independently and dynamically with respect to the others.

Abstract: A circuit for controlling a reproduced volume level of an audio signal to a desired level includes a peak detector for detecting a peak amplitude level in the audio signal, a user operable control for generating a signal indicative of a desired amplitude level, a comparator for comparing the detected peak amplitude level in the audio signal with the desired amplitude level and for generating a comparison signal as a result of the comparison, and a voltage controlled amplifier coupled to the comparator for adjusting the peak amplitude level in the audio signal in dependence on the comparison signal. The output from the voltage controlled amplifier then has the desired level.

Abstract: Method and circuit arrangement for adjusting the volume in a mobile telephone. The telephone comprises a transceiver unit and on the other hand a physically separate operating device. A dc voltage level (DC) corresponding to the desired volume is adjusted with a potentiometer (1) in the operating device and the level is converted with an A/D-converter (2) into a corresponding digital control signal. The control signal is read with a microprocessor (3) in the transceiver unit, which further through the hold circuit (4) controls the gain of the audio amplifier (7). A multiplexer (5) may be provided for controlling and selecting a suitable feedback resistor (6) for the amplifier. The A/D-converter can be located in the operating device or in the transceiver unit. When it is located in the transceiver unit the dc voltage level (DC) is transmitted to the transceiver unit, preferably superimposed on the AC-signal received from the microphone, which then is filtered off before the A/D-converter.

Abstract: Radios (104) are commanded to determine the ambient sound level. A code representing the ambient sound level is transmitted to a calling radio (104c) or base unit 102, that determines whether to adjust the volume level (up or down) of the called radio (104a, 104b). In this way, messages will not be missed when the radio is used in a noisy environment, and messages will not be presented at an uncomfortable volume level when the radio is operating in a quite environment. In another embodiment, the called radio (104a, 104b) transmits whatever ambient sounds exists, and the ambient sound level is determined by the calling party (104c, 102).

Abstract: A remote control receiver which can be "taught" to recognize a remote control signal from any of a plurality of remote control receivers as its control signal. For this purpose, the transmitting code and the carrier of a remote control signal are analyzed and the transmitting code is stored in connection with the instruction content during a learning mode. Then, during normal operation, a received remote control signal is filtered by a band pass filter in which the filter band is set in accordance with the carrier of the remote control signal stored during the learning mode. The filtered signal is then decrypted with reference to the stored transmitting code, thereby permitting receipt of the remote control signal transmitted from a heterogeneous remote control transmitter. In this manner, the remote control receiver may be "taught" to respond to commands from a remote control transmitter the user is accustomed to using.

Abstract: In an audio and/or video electronic apparatus, such as, a television receiver or a video tape recorder, which, in a remote control mode, is capable of having operations thereof controllable by respective first remote control codes in response to the reception of corresponding signals from a first remote or separate control transmitter intended for use with such apparatus; there is provided, as an integral component of the electronic appartus, a nonvolatile memory in which, in a programming or learning mode, the first remote control codes are written in association with respective second remote control codes for controlling the same operations and which are generated in response to the reception of corresponding signals from a second remote control transmitter intended for use with a different electronic apparatus.

Abstract: A telecommunications system including a mobile unit is protected from operator-induced disruption by disabling the operator-adjustable controls of the mobile unit and fixing the operating parameters of the mobile unit. A supervisory apparatus incorporating supervisory circuit elements replacing the adjustable circuit elements associated with the operator-adjustable controls may be plug-connected between the main chassis and the control head of the mobile unit.

Abstract: A hearing aid comprises a microphone, a battery-operated earphone, and amplifying circuit connected to the microphone output, the amplifying circuit including a frequency-selective circuit component and a sound level adjustment circuit component connected to the frequency-selective circuit component, and a remote sound wave control signal emitter circuit separate from the microphone, earphone and amplifying circuit and emitting sound wave control signals within the range of the microphone input.

Abstract: A multi-bit program identification signal is transmitted in the audible band with a program signal, and a receiver detecting the program identification signal automatically sets a predetermined minimum volume for reproduction of the program information. The volume control circuitry at the receiver can be made responsive to any one of a plurality of different program identification signals.

Abstract: A keyboard with number and volume control pushbuttons is provided with a microcomputer, a digital-to-analog converter, and an output circuit to provide signalling tones to a radio transmitter in response to operation of the number pushbuttons, and to provide volume control signals to a radio receiver in response to operation of the volume control pushbuttons.

Abstract: A television receiver is adapted for use of standardized plug-in descramblers which are coupled to the receiver by a connector. The connector is accessible from the exterior of the housing of the receiver without significant disassembly. The connector has terminals electrically coupled to various key points in the receiver. Each type of descrambler is adapted for descrambling a particular type of scrambled signal, and for that purpose uses certain of the connector terminals. The plug-in descrambler also selects the operating frequency characteristics of the tuner.

Abstract: A control system for a cable television transmission line which has functions of collecting and controlling data. Information is collected by generating an instruction and transmitting same to a microcomputer by space communication. Furthermore, the operating conditions of a remote cable television line amplifier can be changed by generating an instruction from the microcomputer.

Abstract: A radio transceiver is disclosed having manual controls on a microphone and the remainder of the circuitry located in a main chassis. The microphone and chassis are connected by means of a multiconductor cable, and time sharing multiplexing techniques are utilized and serially transmit information, bidirectionally, along a common data line while a clock line is utilized to synchronize the operation of main chassis and microphone circuitry. Multiple bit binary coded digital words are sent to the microphone to activate microphone displays while analog signals are sent from the microphone to the main chassis to provide analog control signals for the transceiver.A digital synchronizing pulse detector is disclosed for use in the above transceiver multiplexing system. The detector identifies synchronizing pulses which occur in the clock signal wherein the identification insures the synchronization of microphone and main chassis circuitry.

Abstract: A control circuit for controlling selected functions in a signal receiver, such as a television receiver, in response either to remotely generated control signals of different selected frequencies or to manual controls which are provided on the signal receiver. The control circuit comprises an integrated circuit having a first input for receiving the remotely generated control signals. A frequency discriminator is included in the integrated circuit to detect the frequency of a signal applied thereto and to produce corresponding function control signals. A variable oscillator, also included in the integrated circuit, selectively generates local control signals of substantially the same different selected frequencies as the remotely generated control signals. A mixing circuit supplies the received remotely generated control signals or the local control signals to the frequency discriminator.