Translation of "Backward channel" in German

Unlike other transmission technologies, IPTV offers a backward channel that allows interactive enjoyment of TV.

For loading an amount of money onto the chip card, however, a backward channel must be available.

Whether forward or backward, each channel has the same message in round robin effect with repeating man, woman and child voices.

The delay difference or a signal extracted therefrom is converted by the coder circuit COC and transmitted as a correction signal via the associated O&M backward channel to the back-up central unit CU2, which thereupon adjusts its transmission delay device TDL2 until the signal delays from both central units CU1 and CU2 to the special line unit SDU are exactly the same, that is to say a phase difference also no longer occurs between the receive signals in the special line unit.

The radio receiver includes user interfaces and a multimedia unit, which includes a digital radio receiving unit and a backward channel unit.

Interactive services are initiated and controlled by the user through a backward channel (i.e., the system is used interactively).

In a first embodiment, DE 197 34 365 A1 discloses that the navigation processor requests the other data necessary for navigation from a service provider, via the communication unit or via the backward channel unit implemented in the digital radio broadcast.

Said unit evaluates the contents and immediately transmits them as an echo again via an O&M backward channel, the information of which is also received by the back-up central unit CU2.

Such methods are known, for example, from data transmission via satellite in which the backward channel is implemented via a modem line.

It is advantageous in this case that no backward channel is required from the requesting station of the fee-based services to the fee-based server, or to the fee-based suppliers.

Since data relating to the usage and the incurred cost can be stored directly on the chip card, a backward channel does not have to be provided.

Consequently, there is provided a system for using fee-based services from different service providers A, B, C wherein no backward channel is required for debiting money for actually using a service.

Thus, in conventional methods, a backward channel is always reserved, which can effect a band width reduction on the forward channel.

In particular, in accordance with the prior art, it is disadvantageous that a backward channel must be provided for a communication process, which returns a response to the sending unit.

Moreover, the backward channel, namely, the forming of images of the traffic participant using the camera, is able to be used preferably to check whether a current classification of the traffic participant has been carried out correctly.

By the use of the backward channel one may then advantageously effect a more accurate classification or rather an improved differentiation.

This advantageously creates a backward channel to check whether the traffic participant has recognized that he himself has been recorded and recognized by the recording apparatus.

After the transmission of a reception burst, the mobile telephone switches to the transmission frequency, which is offset by 45 MHz, and transmits the burst of the backward channel to the base station on this transmission frequency.

As a result, a multiple-step image data processing method is created, wherein the object information obtained from the image processing for controlling vehicle parameters and/or vehicle functions can be advantageously used, in particular by means of a backward channel from the image processing device to the image conditioning device, for the conditioning of the image data for display in the vehicle, for example in order to highlight objects and/or to mark them in the image when the image data is displayed.

Generally, after modification of the channel characteristics or at regular time intervals, the respective transmission characteristics are determined, a corresponding bit allocation table is established and these are aligned during BAT signaling via the backward or control channel.

When setting up the backward channel, special consideration must be given to the fact that a private in-house network can cause considerable interference in the non-proprietary telecommunications network.

The transmitter-side bit allocation table 15 is aligned, for example, via a backward or control channel, which is generated during BAT signaling, with the receiver-side bit allocation table 9 .

For downloading, a corresponding backward channel can be created, for example at a different frequency, and is operated in exactly reverse manner.

For example, the key 21 can be assigned the function “change channel forward” and the key 22 can be assigned the function “change channel backward.”

Owing to the modernization process the cable has now more range and sufficient place for a backward channel, which is necessary for Internet and telephone.

Through the inside of the inner drill pipe a bentonite drilling fluid is pumped which exits at the front end from the rock drill head 10 in the area of the roller bit arrangement 12 and transports the earth particles excavated by the roller bit arrangement 12 through the bore channel backward out of the bore channel.