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transmission speed of USB interfaces is much higher than that of serial ports and parallel ports, therefore, the current market hotspot is the USB interface digital camera. The following mainly refers to the digital camera with USB interface. How cameras work The working principle of the camera is roughly as follows: the scene is projected to the image sensor surface through an optical image generated by the lens (lens), and then converted to an electrical signal, after A/D (modulus conversion)
when the data is collected. And in the DMA interrupt service program according to the actual need to complete the corresponding video processing, after the real-time encoding compressed video data stored in the external SDRAM, the hardware circuit needs to provide TVP5150 required 14.31818 m Hz clock frequency, The DM642 can be set via the I²c bus for TVP5150 parameters. Audio Input Acquisition Module The audio input acquisition module consists of 2 pcm1801u audio acquisition circuit and its
opportunity to use, and later do OTT voice (app voice) used in the WEBRTC 3A algorithm. After doing the audio development on the Android mobile platform, I used the Neteq on the WEBRTC, but used the earlier C language version, not the C + + version, and only involved the DSP module in Neteq (Neteq has two modules, MCU (Micro control unit , Micro Control Unit) and DSP (digital signal processing, signal Proc
OSS audio interface programming in Linux-general Linux technology-Linux programming and kernel information. For details, refer to the following section. CODE :/*Name: SndKit. cCopyright: GPLv2Author: rockins (ybc2084@163.com)Date: 15-10-06Description: implent raw sound record/playRun :. /SndKit [-h] [-d device] [-c channel] [-B bits] [-f hz] [-l len] E.g .:./SndKit-h show help information./SndKit-r record.wav record audio from microphone (/dev/
Research on the Application of tms320128in Machine Vision Source: Micro-Computer Information Author: Liu Yuan Yi Zhigang Zhang Jian Wang Juan ContentsBefore, General Machine Vision Information processing platforms mainly include (1) based on general PC: Mainly using software for image processing and recognition, providing medium image processing and recognition capabilities, but occupying excessive CPU processing capabilities; (2) based on general DSP
What is Da Vinci technology? For more information about Da Vinci technology, refer to TI's official website. Da Vinci technology is not only a SoC chip of DSP + arm dual-core architecture, but also a complete set of Software Development kits. In my opinion, the latter is the core of this technology. Because there are many DSP + arm processors, I. mx27 is one of them. Da Vinci technology includes the followi
/*Name:sndkit.cCopyright:gplv2Author:rockins (ybc2084@163.com)date:15-10-06 18:22Description:implent Raw Sound Record/play Run:./sndkit [H] [D-Device] [-C channel] [-B-bits] [f-Hz] [-L-len] e.g.:./sndkit-h Show Help information./sndkit-r record.wav record audio from microphone (/DEV/DSP)./sndkit-d/dev/dsp-p record.wav Playback record.wav VIA/DEV/DSP./sndkit-b 8-f
associating the file paths, file directory items, and FAT tables, you can fully grasp the storage of a file on the hard disk. Figure 5 shows an example to locate all the content of a file through the following steps:(1) Find the cluster (a) in the directory where the file is located through the path ).(2) Compare the file name in the space (c) corresponding to the directory and find the file directory item (d) corresponding to the file ).(3) determine the starting cluster and file size of the f
Power Supply Design of Radar Video Signal Simulator Based on TPS54310 [Date: 2008-10-13] Source: foreign electronic components by Liu Donghai, Ren Yongfeng, Li shengkun [Font:Large Medium Small] 1 IntroductionThe radar video signal simulator is an important device for debugging the radar signal processor. It has the analog environment and target video echo signal functions and is used to evaluate the performance of the radar signal processor. Because the analog generation
Image Processing System Based on tms320dm2. [Date:] Source: China Power Grid Author: Yan Ning, Yu yunqi [Font:Large Medium Small] 1 Introduction With the rapid development of large-scale integrated circuits, DSP performance is becoming more and more perfect and can meet the real-time requirements for data processing speed during image processing. An image processing system built with DSP
Design and Implementation of secondary bootloader of the TMS320C6000 series: microprocessor and DSP | Source: electronic engineer | Author: Xie Shiyi Li yongchao Introduction With the extensive application of DSP (Digital Signal Processor) systems, the program scale is also expanding. the boot-loader of the chip itself is used to guide the DSP program through fl
obvious. Therefore, it does not have to rely heavily on the JTA specification when using container-based transaction types as EJBS do. It accomplishes the partitioning of transactions by providing the following two implementation scenarios: Declarative transaction management (declarative Transaction Management) Programmatic transaction management (programmatic Transaction Management) Alth
What is a Cookie Mapping. Simply put, a cookie Mapping a cookie that is a user's subordinate to the SSP and is mapped to a cookie attached to the DSP. Cookie Mapping work requires two data, respectively, the user is subordinate to the SSP side of the cookie and the user is subordinate to the DSP side of the cookie, at the same time require the SSP or DSP side o
This source is based on the linux3.3.0 version of the kernel in the Dvsdk_omapl138-evm_04_03_00_06_setuplinux package. Implementation of EDMA support UART features mainly modify DMA and 8250 of the source code. First, the DMA channel resource is allocated for OMAPL138 arm and DSP, which has three uart,uart1 occupying edma0cc0 Channel8 (Rx), Channel9 (TX) channel and SLOT8 (RX) and Slot9 (TX); The UART2 occupies the channel12 (Rx), CHANNEL13 (TX) chann
number of users . Because of the power consumption, the cell phone must carry large chunks of battery, resulting in a large volume, shaped like a board brick. Street hooligans fight, often pick up the floor of the board brick hit people, if carrying a mobile phone, when the nasty when you can also use the cellular phone as a board brick.Figure 3.the hardware architecture of the second generation handset with DSP as the core[4]. Courtesy Http://farm3.
use cheaper 1000BASE-TX devices. The transmission performance of cat6 Cabling Standards is much higher than that of cat5e, which is suitable for applications with the same transmission rate or higher than 1 Gbps. It opens the door to the development of high-speed applications in the future. Cat6 cabling standards not only provide a new network application platform, but also greatly improve the service quality from digital voice and video applications to desktops. The introduction of the six sta
SDK from the Internet (only the SDK for the desktop system, no mobile version, and the documentation is only in English ):Http://msdn.microsoft.com/en-us/windowsmedia/bb190309.aspx First, we will summarize the extended development of WMP In the desktop operating system. Windows Media Player mobile is a subset of media player.Windows Media Player Skins Microsoft fully supports skin on mobile. If you want to design a Windows Media Player with beautiful personality on mobile, You need to design pi
Debugging experience-davinci features Each hardware platform has features that other platforms do not have.Here, I will summarize the platform features problems I encountered during dm6446 debugging: 1. Use of hardware resize; 2. Address Analysis of davinci; 3. Use of shared memory CMEM. 1. resize debugging of 6446: There are two routines in the 6446 dvsdk, one is the video loop and the other is the codec encodedecode, and I need a video loop program called by the
With the introduction to spring from this series of articles, we have a preliminary understanding of the use of spring and the two core features of the IOC, AOP, and the combination of my personal work, since the project is a finance department , that control of the transaction is essential, and is very strict control. According to my research on the project, it uses the JTA transaction in the management module, but in the transaction module uses the JDBC matter , however, the use of all these t
How many cores do you have on your phone? This is one of our most frequently asked questions when comparing the two phone differences. The number of CPU cores is indeed an important indicator of the performance of a mobile phone, but it is not the most accurate indicator.Take the most common Qualcomm Snapdragon in the market, for example, in the entire "processor", the CPU portion only accounted for 15% of the chip area, the other 85% is the image Processor (GPU), Digital signal Processor (
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