Abstract: The system is formed by a base station STB1 and two mobile stations STM1 and STM2. The information exchange between these stations is performed by means of two time multiplex signals which are transported by frequency channels with carriers F1 and F2. In accordance with the invention, the information systematically transmits transformed interleaved data over the two frequency channels. The resistance against fading is notably improved.

Abstract: A device (5) for measuring temperatures without mechanical contact comprises a bolometer with thermistors (20.sub.1, 20.sub.2, 20.sub.3, 20.sub.4) arranged as a Wheatstone bridge. Some of the thermistors (202, 204) are shielded and some of the thermistors (20.sub.1, 20.sub.3) are not shielded so as to allow or not to allow them, respectively, to receive thermal radiation (25) from an object (OBJ). The thermal radiation heats the non-shielded thermistors and produces an unbalance (v) of the bridge. This unbalance is canceled by heating all the thermistors by an additional heating (18, 26). In the balanced state the temperature of the object is equal to that of the thermistors. The additional heating is preferably achieved by causing the electric power supplied to the bridge to be varied. Computing means (14) enable the temperature of the object to be derived from current/voltage ratios relating to the thermistors.

Abstract: A transmission network having a plurality of transmitter stations receiving signals over different transmission links from a common source. The transmitter stations transmit frames including the same data packets, substantially simultaneously over the same frequency. To ensure that the same data packets are included in each given frame, the source adds frame start codes to the signals transmitted over the links.

Abstract: A housing for holding a disc-shaped information carrier having a bottom section including a holding device, and a cover section which is hingeably connected to the bottom section. The bottom section is box-shaped and has transparent front, side and rear walls. The bottom section contains an insert sheet having portions which extend adjacent each of these transparent walls, including substantially the length of the side walls. Each of these portions may be provided with readable data relating to the information stored in the information carrier.

Abstract: Method of manufacturing a multilayer structure, in which method gold is deposited on a basic layer (3, 11) for forming a gold layer (7, 13), whereafter aluminium oxide is deposited on the gold layer for forming an aluminium oxide layer (9, 15). Silicon oxide is deposited on the aluminium oxide layer by means of PE-CVD for forming a silicon oxide layer (11, 13), and the aluminium oxide layer constitutes an adhesive layer between the gold layer and the silicon oxide layer. Together with the aluminium oxide layer, the silicon oxide layer constitutes an insulating and/or protective cladding layer for the gold layer.

Abstract: Compressed digitally encoded video signals are transmitted over an asynchronous transfer mode network with varying grades of service dependent on bitrate requirements for a desired picture quality and the currently available network capacity. To maximize transmission quality and minimize cost, the grade of service requested from the network is changeable in response to scene changes.

Abstract: Integrated, juxtaposed head units of a magnetic head have transducing gaps directly adjacent a central plane transverse to the longitudinal direction of relative movement of a magnetic recording medium, adjacent transducing gaps being to opposite sides of the central plane. Head units adjoin each other so that a recording channel density of 100% is achieved. In one embodiment a common electrical conductor passes through a plurality of head units to one side of the central plane, and electrical connection tracks extending from a portion of the conductor form inductive transducing elements.

Abstract: Distortion or noise in detected signals, due to intermodular distortion in transmitting sets which transmit multiple channels simultaneously via the same element or component, is reduced by selecting carrier frequencies such that they are not all spaced by the same given frequency. In one embodiment, a first group of channels have one spacing, and an adjacent group have the same spacing but with carrier frequencies offset from a multiple of the spacing used in the first group. In another embodiment, the carrier frequencies of adjacent channels are unequally spaced. Two adjacent blocks of channels may use the same, or different, patterns of unequal spacing.

Abstract: Single-channel magnetic head having a head face (1) which extends in a first direction (I) in which a magnetic record carrier (3) is relatively movable with respect to the magnetic head, and in a second direction (II) transverse to the first direction. The magnetic head has a structure of layers which, viewed in the first direction, are situated one on top of the other and extend substantially in the second direction and a third direction (III) transverse to the first and the second direction. The structure is provided with a magnetoresistive measuring element (5), a first magnetic element (7) and a second magnetic element (9). Both magnetic elements are electrically conducting, while the measuring element is arranged electrically in series between the two magnetic elements for passing a measuring current (i) through the measuring element substantially in the third direction. Each magnetic element has an electric contact face (7a, 9a).

Abstract: A combination of broadband program materials, such as TV, plus digital communications services of all types, are broadcast to a cell in the same frequency band, such as 27.5 to 28.5 GHz. The combination of all the transmitted channels have a combined bandwidth substantially exceeding the frequency band. At least some of the channels are transmitted with two diversity characteristics different from those of other channels. In one embodiment analog signals transmit the broadband services, preferably using wide deviation FM modulation, the FM channels filling the band. By choosing carrier frequencies selectively, between 5 and 9 T-1 digital channels can be broadcast in each FM channel when polarization is the same. Differing polarization of digital and FM signals in the same band can enable selection and detection of the desired one of a full spectrum of digital signals, or any one of the analog signals.

Abstract: A method for the distributed execution of an interactive multimedia program in which the interaction with the user takes place via a local station and the actual execution takes place in a powerful central station. To this end, user commands to be executed are applied from the local station to the central station and the presentation commands generated by said execution are applied from the central station to the local station. The audiovisual data presented to the user is locally stored and is not transported via the connection. Consequently, the connection requires only a small bandwidth.

Abstract: Two magnetic layers are mutually interconnected by a constricted region also made of a magnetic material. The layers may be separated by an intermediate non-metallic layer having a hole filed with magnetic material to from the constricted region. Alternatively, the layers and constricted region may be substantially co-planar. The constricted region minimum cross-section dimension preferably is less than one micron, and ideally of the order of 100 nm, thus being much smaller than the diameter of a magnetic domain. A high magneto-resistance ratio is obtained, and electrical and magnetic properties of the sensor can be adjusted largely independently.

Abstract: The invention relates to a multi-domain liquid-crystal display device comprising two substantially parallel substrates which are provided with an electrode layer and an orientation layer. A layer of a nematically ordered liquid-crystalline material comprising a chiral dopant is sandwiched between the substrates. The layer is structured in such a manner that the pixels of the layer are composed of at least two types of sub-pixels in which the twist senses of the liquid-crystalline material are mutually opposite. This construction in accordance with the invention is achieved by differentiating the composition of the chiral dopant in the different types of sub-pixels. This is attained by employing isomerizable chiral dopants and/or diffusion techniques in combination with local exposure of the liquid-crystal layer. The invention also provides methods of manufacturing such multi-domain liquid-crystal display devices.

Abstract: Recording and/or reproducing device (1) having at least one magnetic head (8, 9) provided for scanning a magnetic record carrier (6) and having a lead-in core limb (34) and a lead-out core limb (35) each consisting of a monocrystalline ferrite and constituting a transducing gap (37), in which the lead-in core limb (34) has a mechanical main direction (39) in a <100>-direction of its monocrystalline ferrite, which main direction encloses an acute angle .THETA..sub.E with respect to the transducing gap (37), and in which the lead-out core limb (35) has a mechanical main direction (41) in a <100>-direction of its monocrystalline ferrite, which main direction encloses a second acute angle .THETA..sub.A with respect to the transducing gap (37), the two acute angles .THETA..sub.E and .THETA..sub.

Abstract: A method of adjusting the mutual separation (g) of the two overlapping metallic cantilever members (9, 11) within the vitreous envelope of a reed switch, having a beam (21) of radiant energy to which the envelope is substantially transparent directed for a controlled period of time through the envelope onto a localised area (p) of at least one of the members (11), causing permanent thermally-induced bending of that member (11) about the irradiated area (p).

Abstract: Complex coding of speech signals, as this is used, for example, in the GSM half rate speech coder, requires the use of a signal processor. On the other hand, a hands-free facility requires an arithmetic unit which adaptively calculates filter coefficients. This is only effected during speech pauses in which the speech coder is switched to a mode in which it generates codes for background noise with only little processing circuitry and expense. According to the invention, the signal processor for the coding device is therefore used for calculating the coefficients for the echo cancelling filter during speech pauses. This requires the use of not more than a single signal processor which can thus be used twice.

Abstract: A method of manufacturing a magnetic field sensor having a stacked structure of:an exchange-biasing layer (2) comprising nickel oxide on a substrate (1) anda magnetic layer (3) which is exchange-biased with the exchange-biasing layer (2),whereby at least the exchange-biasing layer (2) is provided by sputter deposition using a sputter gas which comprises Ne and/or He. The magnetic layer (3) preferably comprises permalloy. In a particular embodiment, the magnetic layer (3) is separated from a second magnetic layer (5) by an interposed non-magnetic layer (4), so as to form a spin-valve trilayer.

Abstract: Display device comprising an electro-optical medium, for example an LCD of the (super)twisted nematic type in which the capacitive influence on the switching behaviour of extra (dummy) electrodes employed to neutralize the difference in electro-optical behaviour (discoloration) is compensated by giving the extra electrodes a fixed voltage or by providing a pattern of the dummy electrodes on the other substrate, particularly on non-overlapping parts of the picture electrodes.

Abstract: Method of manufacturing a multilayer thin film magnetic head having reproducibly narrow gap widths, by:providing a stepped non-magnetic basic layer;providing a stepped magnetically permeable layer on the stepped basic layer;providing a stepped non-magnetic layer on the magnetically permeable layer;planarizing the structure to a level to expose the stepped part of the first magnetically permeable layer in the planarized surface, so that the thickness of the first magnetically permeable layer determines the width of the transducing gap of the magnetic head which is being formed.

Abstract: A housing for storing a disc-shaped information carrier, for example a DVD. The housing is provided with a bottom part (1) with a retaining device (7) for the information carrier and a lid part (3) which is connected with hinging possibility to the bottom part. Two corner hinges form the connection here, which corner hinges comprise two recessed hinge arms (30) of the hinge part and two matching recessed hinge walls (36). The lid part is provided with protection walls (42) which extend at the outside of the housing substantially parallel to the hinge arms so as to protect the hinge arms from external mechanical influences.