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Method for tuning soft data in multimedia data stream and soft data demapper

A multimedia and data stream technology, which is applied in a field of adjusting soft data in multimedia data streams, can solve problems such as error digital TV signal playback quality, etc.

Inactive Publication Date: 2017-07-21
MSTAR SEMICON INC
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Problems solved by technology

[0005] In order to solve the obvious error generated when the soft data is simulated by the Gaussian model in the prior art and the broadcast quality of the derived digital TV signal, the present invention proposes a method for adjusting the soft data in the multimedia data stream, and a soft data demapper ( Soft Demapper), and a multimedia data stream computing system

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  • Method for tuning soft data in multimedia data stream and soft data demapper
  • Method for tuning soft data in multimedia data stream and soft data demapper
  • Method for tuning soft data in multimedia data stream and soft data demapper

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Embodiment Construction

[0025] see figure 2 , which is a schematic diagram of the soft data demapper 100 disclosed according to an embodiment of the present invention. Such as figure 2 As shown, the soft data demapper 100 includes a soft data generator 110 , a scale factor determination module 120 , a channel response generation module 130 , and a dynamic channel adjustment module 140 .

[0026] The soft data generator 110 is used to calculate a plurality of soft data SD1 contained in a received multimedia data stream MDS.

[0027] The adjustment factor determination module 120 is used to query the correspondence between the channel information FI and the encoding rate information CI in a look-up table stored in the adjustment factor determination module 120 according to a channel information FI and a coding rate information CI stored in the multimedia data stream MDS An adjustment factor SF of , wherein the manner of inquiring the look-up table to determine the adjustment factor SF will be expla...

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Abstract

The invention proposes a method for adjusting soft data in a multimedia data stream, a soft data demapper, and a multimedia data stream computing system. By determining the adjustment factor for adjusting the signal based on the signal with a low bit error rate, and using the adjustment factor to adjust the soft data, the soft data can be effectively simulated by a Gaussian model with obvious errors from the real situation. It amplifies the influence of signals with low bit error rate and relatively reduces the influence of signals with high bit error rate, so that the obvious errors caused by using the Gaussian model and the derived digital TV signal playback quality problems are solved together.

Description

technical field [0001] The present invention relates to a method for adjusting soft data in a multimedia data stream, a soft data demapper, and a multimedia data stream computing system, in particular to a method for adjusting the soft data by using the corresponding adjustment factor when the bit error rate is the lowest A method for adjusting soft data, a soft data demapper using the above method, and a multimedia data stream computing system using the soft data demapper. Background technique [0002] In the multimedia data stream transmitted by the digital TV channel, the ideal Gaussian model (GaussianModel) is generally used to simulate the channel model of the signals of various channels. However, when the transmission of digital TV signals is carried out in a dense urban area or in a fully scattered environment (fully scattered environment), the simulation results of the Gaussian model will appear difficult to ignore compared with the real channel models of digital TV ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N21/435H04N21/235H04N21/45
Inventor 郑有财童泰来林东昇蓝景赋
Owner MSTAR SEMICON INC
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