參數(shù)資料
型號: ISD-SR3000
文件頁數(shù): 16/120頁
文件大?。?/td> 1293K
代理商: ISD-SR3000
1-11
1—HARDWARE
ISD-SR3000
ISD
1.2.7
EXPANSION MEMORY ADDRESSING
FUNCTIONAL OVERVIEW
The ISD-SR3000 requires memory subsystems with enhanced physical address space and a
paging scheme. The typical memory requirement for the system is 2Mbytes of ROM to store
the application database, and an additional 64Kbytes of SRAM to enable the software to per-
form sophisticated search on the database.
The diagram below describes the connection of the ISD-SR3000 to external memory space of
2Mbytes. This connection is typical for a recognition application. The external ROM holds the
acoustic models (1Mbyte). The flash holds all the topics tables (vocabulary), speech prompts,
and voicetag recordings that support the specific application (1Mbyte). The SRAM is used by
the ISD-SR3000 as extension for the memory and is used to carry out the HMM algorithm
(64Kbytes).
Figure 1-8: ISD-SR3000 connection for external memory space of 2Mbytes
Note
: If the application does not support user-created voicetags, the Flash can be replaced with a ROM.
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