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Time inverse-interlacing memory reducing method for DMB signal receiver

A technology of signal receiver and memory, which is applied in the invention field of digital multimedia broadcasting, can solve problems such as waste of memory, and achieve the effect of reducing the size of the gate

Inactive Publication Date: 2009-08-19
LEJIN GUANGDIAN ELECTRONIC CO LTD SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0018] According to the above-mentioned DMB specification, there are 55296 samples in one frame, so the memory size of a general time deinterleaver, when its soft decision (soft decision) forms 4 bits, requires a memory of 16×55296×4 bits; however, the actual time de-interlaced memory, within 16 frames only use figure 1 The middle dark part, so the remaining part is the unused (idle) part, resulting in a waste of memory

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  • Time inverse-interlacing memory reducing method for DMB signal receiver
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  • Time inverse-interlacing memory reducing method for DMB signal receiver

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Embodiment Construction

[0039] Hereinafter, the structure and function of the embodiment of the present invention will be described with reference to the drawings.

[0040] image 3 It is a block diagram of the DMB signal receiver in the present invention.

[0041] Refer to image 3 , The DMB signal receiver includes the following components: the antenna 11 that receives the transmitted broadcast signal; the tuning of the received signal input to the above-mentioned antenna 11 into the required intermediate frequency (Intermediate Frequency) pass-band signal In the above-mentioned tuned signal, in order to maintain the size of the signal input to the A / D converter 14, the AGC (Automatic GainControl) device 13 that multiplies the calculated gain value according to the standard signal; the above-mentioned certain size A / D converter 14 that converts the converted digital signal into a digital signal by sampling processing; a mode detection device 15 that detects the transmission mode of the converted digita...

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Abstract

The present invention relates to the invention of a digital multimedia broadcasting (Digital Multimedia Broadcasting: DMB) signal receiver; in particular, a time deinterleaving memory reduction method in a digital multimedia broadcasting signal receiver. In the digital multimedia broadcasting signal receiver of the present invention, the method for reducing time deinterleaving memory in the digital multimedia broadcasting signal receiver uses a memory suitable for deinterleaving data that has been interleaved for a certain time; and the memory is only used for actual The used parts are segmented.

Description

Technical field [0001] The present invention relates to the invention of digital multimedia broadcasting; in particular, a technology for reducing the memory size required in the time deinterleaver of a digital multimedia broadcasting signal receiver. Background technique [0002] Generally, the digitization of broadcasting has brought considerable impact to the existing analog radio broadcasting, and has led to the advent of the era of digital radio broadcasting. In addition, not only the existing voice radio broadcasting services, but also Digital Multimedia Broadcasting (DMB) including data transmission and multimedia services have become possible. Digital multimedia broadcasting, because it overcomes the influence of noise and distortion on the transmission channel, not only has a relatively high transmission efficiency, but also provides a variety of multimedia services. [0003] The Digital Multimedia Broadcasting (DMB) currently adopted in Korea is based on the European te...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/03H03M13/27H04J4/00
Inventor 姜益善高禹锡
Owner LEJIN GUANGDIAN ELECTRONIC CO LTD SHANGHAI