Systems, methods, and software products allocate digital content m real time. Real-time digital content allocation includes processing sign, sales and buying parameters for a digital sign in a sign database. Real-time digital content allocation also includes processing digital content in a submitted database; permitting access to the submitted database by a digital sign owner, for review of the digital content; saving digital content approved by the digital sign owner to an approved content database; processing bidding parameters for a time slot on the digital sign; auctioning the time slot to providers of the approved digital content; distributing digital content to the digital sign; and airing winning digital content during the time slot.

Systems And Methods For Real-Time Allocation Of Digital Content

A system for correcting errors in data read from a direct access storage device employs an extendable, two-level coding scheme having n subblocks in a relatively long variable-length block of data, each subblock having up to m bytes of data. At the subblock level, decoding capability provides correction of up to t 1 errors and detection of up to t 1 +c errors in each subblock, while the block-level decoding capability provides correction of up to t 2 errors in any one of the subblocks. The combined capability of the system corrects any combination of (t 1 +x) errors in one subblock, and up to t 1 errors in any or all of the other subblocks in the block, where x is a non-negative integer such that (t 1 +x)≦t 2 and x c.

Method and apparatus for correcting multibyte errors having improved two-level code structure

An apparatus for encoding digital data for storage on a data storage medium includes a non-deterministic randomizer code generator. The randomizer code generator may select different randomizer codes for different portions of the data to be stored. The randomizer code used to randomize a given portion of the data may be stored on the media for use in subsequent data retrieval.

Digital data recording channel

Methods and apparatus are provided for recording and reproducing digital information signals including image and audio portions in successive tracks on a magnetic tape. An ID signal is produced for one of an image portion and an audio portion of a corresponding digital information signal to be recorded. The ID signal indicates whether the portion is to be after-recorded in a respective track. The ID signal is combined with the portion to form a recording signal. Previously recorded digital information signals are reproduced from the track and an ID signal thereof is obtained. The recording of the portion in the track is controlled based on the reproduced ID signal.

Method and apparatus for reproducing and after-recording digital information signals on magnetic tape

The present invention is a novel and improved technique for decoding with particular application to turbo, or iterative, coding techniques. In accordance with one embodiment of the invention a system for decoding includes a channel deinterleaver RAM for storing a block of symbol estimates and for reading out at least three different portions of said block in substantially simultaneous fashion. A set of 3 state metric calculators receives the three portions in a substantially simultaneous fashion and generate corresponding sets of state metric calculations from said three portions of the channel deinterleaver block.

Partitioned deinterleaver memory for map decoder

An apparatus for re-recording a new digital signal in a track on a magnetic record medium which has a previously recorded digital signal in the track, the digital signal being arranged in data blocks each containing a sync signal, a data signal, an error correction code signal, and an error detection code signal, comprises a reproducing circuit which reproduces each digital signal recorded on the magnetic record medium, a code generating circuit which supplies a discriminating code signal for each of the data blocks, and a recording circuit which re-records the new digital signal and the respective discriminating code signals in the track on the magnetic record medium

Masato Tanaka

Papers

Apparatus for re-recording a digital signal on a record medium and for reproducing the same therefrom