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Device for the trans-compression of a digital audiovisual stream in order to adapt same to existing television equipment

A technology of existing equipment and equipment, applied in the direction of pulse modulation TV signal transmission, color TV parts, TV system parts, etc., can solve problems such as inability to support new compression formats, and achieve the effect of reducing costs

Inactive Publication Date: 2008-04-30
菲利普·格纳博
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] But the disadvantage is that if today's operators want to limit their passbands, but provide programs with the same quality, thereby reducing their broadcast costs, or adopt new sound and image compression technologies, so that the same passband can provide more programs, He must replace all existing receivers installed in the individual's home
In fact, the receivers are all hardware fiber optic components that cannot support the new compression format

Method used

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  • Device for the trans-compression of a digital audiovisual stream in order to adapt same to existing television equipment

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Embodiment Construction

[0015] Figure 1 shows a possible embodiment according to the invention. The DVB-CI module (10) connected in the DVB-CI receiver is composed of a plurality of functional blocks.

[0016] The synchronization of said module (10) and said receiver to which it is connected is carried out by a block CI (16) according to the DVB-CI standard.

[0017] The normalized complete stream TSin from the receiver enters the useful packet filtering and extraction block (11) and is finally demultiplexed due to the identifier of the packet ("Paquet Identifier" or PID).

[0018] It then enters the useful stream decapsulation block (12).

[0019] According to the needs of the program broadcasting operator, the useful stream enters the sound / image decompression block (13) again, and the output is no longer compressed, otherwise the flow is larger (up to 100Mbit / s by quality).

[0020] The uncompressed stream is thus passed through recompressed chunks MPEG2 (14) to make it recognizable to an MPEG2 ...

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Abstract

The invention relates to a device which can be used for on-the-fly conversion, using a new, unknown method involving the receiver already in place at the user's premises, of a low-bandwidth digital audiovisual stream which is highly compressed (for transport reasons) into another digital audiovisual stream which is less compressed but which is perfectly adapted to the receiver in place responsible for performing same. The inventive device is particularly adapted to open receivers and modules which are compatible with the DVB-CI standard.

Description

technical field [0001] The invention relates to a transmission-compression device of a digital audio-video stream, so that it can be adapted to existing television equipment. Background technique [0002] Over the years, the structure of digital audio-visual program playback and reception is actually based on MPEG2 (such as ISO / IEC 13818-1) and DVB compression and transmission standards. The original purpose of implementing the standards is to unify equipment, especially to reduce digital passband (to reduce costs and provide more programs). The technology is installed in satellite, cable broadcasting and receiving devices and, not long ago, in terrestrial digital television. [0003] "Pure" digital streams can reach tens of megabytes per second, while digital streams compressed by the original technology are reduced to a few megabytes per second. The compression standard was determined more than ten years ago, and the most widely used in audio and video is "Main Profile a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/24H04N5/00H04N7/26H04N7/50
CPCH04N19/00781H04N7/50H04N21/4344H04N21/4363H04N21/4184H04N19/00472H04N7/26941H04N21/440218H04N19/40H04N19/61
Inventor 菲利普·格纳博
Owner 菲利普·格纳博
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