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A realizing device and method of bit interleaving in china mobile multimedia broadcasting

A technology of multimedia broadcasting and bit interleaving, which is applied in the direction of error correction/detection using interleaving technology, digital transmission system, and error prevention. The effect of small hardware area and improved RAM utilization

Active Publication Date: 2009-09-16
SANECHIPS TECH CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the current hardware consumes a large area and the RAM utilization rate is low, the main purpose of the present invention is to provide a device and method for de-bit interleaving in CMMB

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  • A realizing device and method of bit interleaving in china mobile multimedia broadcasting
  • A realizing device and method of bit interleaving in china mobile multimedia broadcasting
  • A realizing device and method of bit interleaving in china mobile multimedia broadcasting

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Embodiment Construction

[0026] The present invention will be further described below in combination with specific embodiments.

[0027] Such as Figure 5 As shown, the present invention provides a kind of realization device of de-bit interleaving, realizes the de-bit interleaving of (Mb*Ib) amount of data, comprises control module, address conversion module and single-port RAM, wherein: control module reads according to previous data or writing direction, judge the reading or writing direction of the current data, and inform the address conversion module of the reading and writing direction. The address conversion module calculates the address for writing data into or reading out the single-port RAM according to the read-write direction sent by the control module. The single-port RAM performs data writing or reading according to the address given by the address conversion module.

[0028] Wherein the direction of data reading or writing changes from vertical to horizontal, or from horizontal to ver...

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Abstract

The invention discloses a realizing device of bit interleaving in china mobile multimedia broadcasting, which comprises a control module, an address changing module and a solos RAM; wherein, the control module can judge the read in or read direction of the data according to the former data read or read in direction and inform the address changing module of the read and read in direction; the address changing module can calculate the data read in or read solos RAM address according to the read and read in direction sent from the control module; the solos RAM read or read in data according to the address sent from the address changing module; the invention also discloses the realizing method of bit interleaving in china mobile multimedia broadcasting, which can reduce the area of hardware and effectively improve the utilization of RAM so as to realize the control of cost finally.

Description

technical field [0001] The present invention relates to de-bit interleaving technology, in particular to a device and method for implementing CMMB de-bit interleaving. Background technique [0002] China Mobile Multimedia Broadcasting CMMB (China Mobile Multimedia Broadcasting) mobile phone TV standard has been widely used in recent years, and de-bit interleaving is an indispensable part of channel coding. In the standard specification of CMMB mobile phone TV, there are two kinds of bandwidth Bf of broadcast channel physical layer, including 2MHz and 8MHz. Their corresponding bit interleaver parameters are (192, 144) and (384, 360) respectively. When the bit interleaving technology is written into the interleaver, the LDPC-encoded binary data is written into each row sequentially from top to bottom, with 144 or 360 data in each row, filling the entire interleaver in sequence. When reading out the interleaver, the data is output in columns from left to right, that is, 192 o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H03M13/27
Inventor 曾文雯曾代兵黄智陈冬
Owner SANECHIPS TECH CO LTD
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