Decoder with elastic length

A decoder and filter unit technology, applied in the decoder field, can solve problems such as extra bandwidth waste

Inactive Publication Date: 2011-05-04
HIMAX TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the data filter 210 is usually of a fixed length, for example: n bytes (n-bytes), and therefore the data filter 210 can only compare samples of a fixed length
To more accurately compare the required information, additional follow-up processing is required, which will cause a waste of additional bandwidth

Method used

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  • Decoder with elastic length
  • Decoder with elastic length

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Embodiment Construction

[0043] Before describing the embodiments of the present invention, it is first assumed that the decoder of the present invention is used to filter out the required information from the transmission stream. However, it is not limited to this range and can still be applied to data streams in the form of program streams.

[0044] image 3 Shows a schematic diagram of a transmission stream. Please refer to image 3 , The transmission stream 300 contains transmission packets of the video and audio of each program, and the required transmission packet can be searched only according to the packet identifier (PID). Generally speaking, the packet number is set in the header of the transmission packet. Therefore, in order to obtain information about a specified program in the transport stream 300, the MPEG-2 coding standard defines so-called service information (SI).

[0045] In digital TV applications, service information mainly includes program association table (PAT) 301, program map tab...

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Abstract

A decoder with elastic length comprises a plurality of data filtering units and a control unit. The data filtering units compare the data series flow according to the corresponding sample and output the comparing result. The control unit controls the configuration of the data filtering units. If the space of any data filtering unit storing the sample is not enough to record the comparing sample, the control unit combines two or more of the data filtering units to be an equivalent filtering unit so that the equivalent filtering unit stores the sample and compares.

Description

Technical field [0001] The present invention relates to a decoder, and in particular to a flexible length decoder which enables the decoder to dynamically adjust the length of its filtered data according to samples to be compared. Background technique [0002] With the development of multimedia technology, digital television (DTV) has been able to provide sharp picture quality and better surround sound compared with traditional televisions. Moreover, digital TV adopts digital signal transmission and compression processing, so it can effectively use bandwidth and reduce external noise interference. In the processing of digitized signals, the MPEG-2 coding standard (standard) defines two forms of data streams, namely program stream (PS) and transport stream (TS). [0003] Figure 1A shows a schematic diagram of a program stream. 1A, the program stream 100 is a combination of one or more streams (for example, streams 110 and 120) containing packetised elementary stream (PES) packets,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N21/434H04N21/4623
Inventor 林柏廷徐世大
Owner HIMAX TECH LTD
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