Abstract: There is revealed a progressive and conditional delivery of digital contents. A given master digital content is previously divided in content blocks, each content block being associated with related content blocks presenting particular hierarchical and dependency characteristics. Responsive to user selection of the master digital content, for each selected content block, there is checked first the display of each related content block and upon positive checking there is displayed the considered selected content block. There is further disclosed steps of checking display performed from an analog capture of the user interface or from video frame buffer memory data. There may be detected predefined marks. There may be performed image similarity comparisons or image matching tests with expected images associated with content blocks. There are also disclosed predefined encryption keys being used to decipher one or a plurality of content blocks.

Abstract: There is revealed a progressive and conditional delivery of digital contents. A given master digital content is previously divided in content blocks, each content block being associated with related content blocks presenting particular hierarchical and dependency characteristics. Responsive to user selection of the master digital content, for each selected content block, there is checked first the display of each related content block and upon positive checking there is displayed the considered selected content block. There is further disclosed steps of checking display performed from an analogue capture of the user interface or from video frame buffer memory data. There may be detected predefined marks. There may be performed image similarity comparisons or image matching tests with expected images associated with content blocks. There are also disclosed predefined encryption keys being used to decipher one or a plurality of content blocks.

Abstract: An HF receiver head having high sensitivity and capable of receiving variable-level input signals has characteristics which are adjusted as a function of the received signal level. The HF head essentially comprises a generator for delivering control voltages as a function of the amplitude of the received signals. The dynamic range of the input amplifier and of the mixer can thus be varied as a function of the received signal level up to a predetermined threshold value. Above this threshold value, an input attenuator assumes increasing values which makes it possible to attain a wide dynamic range of the HF head under optimum conditions of sensitivity and linearity.