Thomson Licensing

Tixel Gmbh

Thomson Licensing S.a.

Interdigital Ce Patent Holdings

Andreas Aust

Frank Glaeser

Stefan Kubsch

Eduard Siemens

Jens Brocke

Ralf Koehler

Walter Voessing

Jürgen Schmidt

Johannes Böhm

Frank Gläser

Fei Gao

Ralf Köhler

Stelian Florin Persa

A method of managing a packet administration map for data packets to be received via a network. A receiver in the network monitors sequence numbers and stores missing sequence numbers within an internal data structure, called a packet administration map. A reversed keying is used which means that the upper limit of the range of contiguous missing data packets is used as the key entry in the administration map.

Method of managing a packet administration map

The invention relates to the field of network communication in a wide area, where a local network of a first type has a sending station that communicates with a receiving station in a local network of a second type. A network of a third type is in between the two networks and provides virtual private networking between the two local networks. The network of the first type supports a fine grained QoS, whereas the network of the third type supports a coarser grained QoS. In one example the network of the first type is RSVP capable and the network of the second type is an MPLS network. The invention resides in a component called RSVP-MPLS proxy that maps the RSVP resource advertisements and reservations within an RSVP-aware customer network to an MPLS network, whereby the receiver side doesn't participate in the RSVP communication process.

Method of transferring data between a sending station in a first network and a receiving station in a second network, and apparatus for controlling the communication between the sending station in the first network and the receiving station in the second network

In the method for management of data transmissions in a network, switching means are provided, by means of which a change can be carried out between a first data transmission type and a second data transmission type, as alternative data transmission types between a transmitter and a receiver. The change is carried out on the basis of at least one respectively predetermined criterion. The first data transmission type corresponds to a transport protocol based on rate-based overload control. The second data transmission type corresponds to a transport protocol based on RTT-based overload control.

Optimized selection of transmission protocol respecting thresholds

The invention relates to a method for packet-switching transmission of media data and a device for processing media data. Media data may be video, audio or text data, or other data. Transmission of the data is usually effected according to a streaming method. The data is therein transmitted in packets and re-assembled in the receiving device. For Internet applications, the real-time transport protocol is very widely used in the transmission of data streams. However, this data transmission protocol does not enable a secure transmission which is based on a repetition of the defectively transmitted data. Sequence counters are used according to this protocol so that left-out data packets can be detected in the receiving device. According to the invention, it is provided that error information data is inserted in the destination media data record which is generated from the received data in the receiving device when, according to the transmission protocol, transmission errors are detected in the analysis of the data packets received. The transmission errors are then documented in the destination data record. The stored error information can be analyzed upon reproduction of the destination data record so that it can be evaluated, in particular, whether the recorded original data is so seriously defective that a new recording is inevitable. In particular, this is advantageous in video production where it is necessary to quickly evaluate whether a recorded film or video scene is of acceptable quality (if necessary, taking potential retouching into account) or whether it must be repeated and recorded again.

Method for packet-switching transmission of media data and device for processing media data with insertion of error information data

A method for converting video data comprises providing video data in a first format, selecting consecutive pixel data corresponding to a line or fraction of a line of an image, and adapting a maximum length of a data packet to accommodate the selected pixel data. The payload section of a data packet exclusively carries pixel data originating from one single line of the source image. The method further comprises calculating a start address for a memory in a receiver beginning at which address the pixel data is to be written. The start address is added to a header section of the data packet in the transmitter. The data packet is transmitted via a network. In the receiver the pixel data is written to the memory beginning at the start address indicated in the header section. Video data is read from the target memory in accordance with a second format.

Method for converting between interlaced video and progressive video during transmission via a network

Modern computers () come with different timers having different attributes like time resolution, supported time range and time reference. Some are local timers, representing relative time values like the TSC counter () counting CPU cycles from the power on or reset of the computer. Some are global timers, representing an absolute or real time. Having different classes of timers in the computer (), a number of computations need to be performed to tie the different timers to each other. It is the idea of the invention to define a single high resolution timer structure wherein the time value is represented with a digital number and a flag clarifies whether the timer is a global timer or local timer. The invention enables a much faster processing of the time values. The global time, tied to a high-resolution timer can be tracked much faster. This means better precision of scheduling of time critical jobs, like packet scheduling for data transport.

Method for processing time values in a computer or programmable machine

The invention relates to a new type of quality of service architecture for a network assembly and a corresponding computer network system. The Internet technology as approved by the IETF organization has defined different services. One is the integrated services (IntServ) and the other the differentiated services (DiffServ) architecture. Another is the RSVP Protocol according to which Quality of Service can be implemented with accuracy and richer functionality. The invention shows a way how less sophisticated QoS managers inside the network with only DiffServ or Intserv capability, can be used for enhancing the QoS functionality based on so-called RSVP shadowing messages, and easy to implement RSVP shadowing stacks.

Method for managing data transmission according to a quality of service in a network assembly and a computer network system

A method of operating a network subnet manager, in particular Infiniband network subnet manager in a subnet of a network. Only one subnet manager entity can be master within a subnet. A problem related with this specification is that a specific vendor implementation may exist with many features and internal functionality that are not specified in the network specification. If such a subnet manager loses its exclusivity because another subnet manager enters the subnet, having higher priority, the additional features from the vendor implementation can no longer be used in the subnet. The proposed method solves this problem by allowing a subnet manager that has a lower hierarchy level and thus lower priority to maintain its managing operation by becoming the master subnet manager again.

Method of operating a network subnet manager

When updating a data record identified by a version number, the problem exists that a simple not equal to comparison or greater than comparison is often insufficient for ascertaining the up-to-date nature of the newly received data record, particularly if the data record is transmitted to a receiving station via an unsecured data link and the version number originates from a limited range which is repeatedly run through periodically. The invention solves the problem by virtue of the fact that it divides the range of values of the version number into the ranges 'old' and 'new', on the basis of the current value of a version number. The periodicity with which the range of values is run through is taken into account in this case, however. That is to say that the range &#x201c;old&#x201d; or the range &#x201c;new&#x201d; may perfectly well include the jump from the highest value in the range of values to the lowest value in the range of values. If the version number of the newly received data record lies in the range &#x201c;new&#x201d;, the new data record is accepted as a current data record, and if not it is correspondingly rejected.

Method for updating a data record and device for carrying out the method

The invention relates to a method for managing network resources in a network with a network management device (M), a network component (A), and a further network component (B), and a network management device (M), the method comprising the following steps: transmitting a request for an advance reservation of a network resource by the network component (A) to the network management device (M), wherein the request includes information regarding a reservation start time and a reservation end time; transmitting a request for an ad-hoc reservation of a further network resource by the further network component (B) to the network management device (M); allocating the further network resource to the further network component (B) by the network management device (M); and allocating the network resource to the network component (A) by the network management device (M) at the reservation start time, wherein the network resource comprises a part or all of the further network resource.

Method for managing network resources and network management device

MPEG 1 Audio data compression is based on subband coding. A quantization is performed using a psychoacoustic model which is adapted to the masking behavior of the human hearing. Each subband signal is quantized in such a way that the quantization noise introduced by the coding will not exceed the masking curve for that subband. In ISO/IEC 11172-3 two independent psychoacoustic models are defined. The output from these psychoacoustic models is a set of Signal-to-Masking Ratios, SMR, for every subband n. In order to calculate the SMRfor the psychoacoustic model 2 according to the invention a Fast Fourier Transformation is performed with a length of L=1152 samples by calculating k subtransformations over 2samples with k*2=L and fitting together the results of the k subtransformations.

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Hannover, Germany

Andreas Aust