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DVB-H system and method for performing forward error correction

A digital video broadcasting and forward error correction technology, which is applied in the field of communication systems, can solve the problems of DRAM bandwidth usage efficiency reduction, operation cycle consumption, large transmission volume, etc., and achieve the goal of reducing hardware costs, increasing speed, and increasing access efficiency Effect

Active Publication Date: 2012-02-08
MEDIATEK USA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, transmitting the entire MPE-FEC frame on the bus will generate a considerable amount of transmission
In addition, this method has a more serious disadvantage that each stage in the RS decoding process must be performed in an interleaved order, thus only allowing single-byte DRAM access
Since each DRAM access requires additional operation cycles, the efficiency of DRAM bandwidth usage is greatly reduced
Among them, the cost of extra operation cycle is mainly because before the real data transmission cycle, the access command, row address and column address must be sent first.

Method used

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  • DVB-H system and method for performing forward error correction
  • DVB-H system and method for performing forward error correction
  • DVB-H system and method for performing forward error correction

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Embodiment Construction

[0016] Please refer to Figure 4 , which is a schematic diagram of an embodiment of the DVB-H system of the present invention. The DVB-H system 400 includes a tuner 410, a baseband receiver 420, an embedded memory 430, a host subsystem 440, a media player 450 and an external memory 460, wherein the external memory 460 is implemented as an external DRAM in this embodiment. DVB-H System 400 with figure 1 The difference between the shown DVB-H systems 100 is that the maximum data storage capacity of the embedded memory 430 is 64 kilobytes (64K byte), roughly figure 1 A quarter of the data storage capacity of the embedded memory 130. This is because the embedded memory 430 in this embodiment is only used to store the symptom value of the MPE-FEC frame, not to store the entire MPE-FEC frame. In addition, it should be noted that the functions of baseband receiver 420, host subsystem 440, and external memory 460 are different from figure 1 and figure 2 The functions of the corr...

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Abstract

A Digitally Video Broadcasting—Handheld (DVB-H) system for performing forward error correction includes: a tuner for receiving a data stream; a base-band receiver, coupled to the tuner, for extracting data bytes of a multi-protocol-encapsulation forward-error-correction (MPE-FEC) frame, and performing syndrome calculation on each extracted data byte to determine a corresponding partial syndrome; and an embedded memory, coupled to the base-band receiver, for accumulating each partial syndrome to determine a complete syndrome; wherein once all syndromes of the MPE-FEC frame are received, the base-band receiver determines corresponding error values and utilizes the error values to forward error correct the MPE-FEC frame.

Description

technical field [0001] The present invention relates to a communication system, in particular to a hand-held digital video broadcasting system capable of performing forward error correction and its method. Background technique [0002] As users continue to demand more sophisticated mobile devices, manufacturers are investing in the production of handheld devices, such as cell phones, that support multimedia streaming content. The Digital Video Broadcasting Handheld (Digital Video Broadcasting Handheld, hereinafter referred to as DVB-H) standard is an important standard in this technology that can transmit digital TV video signals and network services. Because handheld devices may suffer from poor reception in certain environments, manufacturers use a method called multi-protocol-encapsulation forward-error-correction, Hereinafter abbreviated as MPE-FEC) additional error correction mechanism to correct errors in received signals. [0003] Please also refer to figure 1 and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/64H04N19/89
CPCH04N21/64315H04N21/4382
Inventor 黄东浩
Owner MEDIATEK USA INC