Method for optimizing digital set-top box EPG system
A technology of a digital set-top box and an optimization method, applied in electrical components, selective content distribution, image communication, etc., can solve the problems of slow display of electronic program guide data, waste of memory, waste of memory space, etc. Analysis speed, improved storage structure, effect of overhead savings
Inactive Publication Date: 2011-09-28
FUJIAN NEWLAND COMM SCI TECH
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The existing EPG system adopts a single-process working mechanism, that is, the CPU (Central Processing Unit) processes the original data packets received from the DVB standard service information code stream in intervals, that is, the capture process of the electronic program guide data; Or split and analyze the original data packet, that is, the analysis process of the electronic program guide data; this will inevitably lead to a slower display speed after receiving and analyzing the electronic program guide data
[0003] At the same time, the existing EPG system uses fixed-length arrays to cache data. Since the data volumes of different EPG programs at different times are inconsistent, this will lead to waste of memory space, such as figure 1 As shown, the length of the Section in the figure is fixed at 4096 bytes, while the EPG database is of variable length, and the length is often less than 4096 bytes, which will cause memory waste
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[0017] The optimization method of a kind of digital set-top box EPG system disclosed by the present invention specifically comprises the following steps
[0018] Step 1. Set the data buffer
[0019] Apply for a continuous space from the memory as the data buffer, and at the same time apply for three variables to indicate the current state of the data buffer. Among them, the read pointer (ReadPointer) is used to indicate the position of the current data read, and the write pointer (WritePointer) is used In order to indicate the position where the current data is written, the control variable (bW_after_R) is used to indicate the sequence relationship of the read and write pointers. The two pointers restrain each other and move circularly to form a ring data buffer; the ring data buffer is made by controlling the read and write pointers The data in the area must be written before it can be read, and when the data has not been read, the write pointer cannot allow new data to overw...
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The invention discloses a method for optimizing a digital set-top box EPG system, which comprises the following steps of: filtering EPG system data information from DVB standard service information code stream in the filtering process; transferring the data into an optimized annular data buffer area the first time; and acquiring the data from the optimized annular data buffer area at any time for analysis in the data analysis process. Two pointers in the annular data buffer area mutual contain and annularly move and the optimized annular data buffer area can effectively perform cache on the data. Therefore, the inconsistency of two processes on the motion speed is coordinated, the data processing speed is improved, the speed of capturing and analyzing the EPG system data is greatly improved, and the asynchronous data processing and buffering can be performed between the two processes based on the annular data buffer area. Meanwhile, a group number structure with the fixed length in the prior art is changed into the annular data buffer area for buffering data; the waste of internal memory is effectively reduced, and the precious internal memory resources of an embedded system are saved.
Description
technical field [0001] The invention relates to the field of digital set-top boxes, in particular to an optimization method for an EPG system of a digital set-top box. Background technique [0002] With the development of digital TV and network technology, analog TV signals are gradually closed, and digital TV signals are gradually popularized. People's demand for digital TV and digital TV value-added services is increasing day by day. With the continuous increase of the number of digital TV programs, when people use a set-top box to watch digital TV, they urgently need a method for conveniently and quickly browsing TV program previews. Under this background, an EPG (Electronic Program Guide) system was created. The existing EPG system adopts a single-process working mechanism, that is, the CPU (Central Processing Unit) processes the original data packets received from the DVB standard service information code stream in intervals, that is, the capture process of the electr...
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IPC IPC(8): H04N21/435G06F12/08
Inventor 黄少雄
Owner FUJIAN NEWLAND COMM SCI TECH