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Based on wavelet transformation and DSP real-time audio frequency video processing system
Monday, July 6th, 2009 at 16:02 | No commentsCategories: DSPShort Content: At present, take the long-distance monitoring, the video frequency conference, the videophone and moved the multimedia communications systems to obtain the important application in reality as representative's low bit rate communications system. Facing the huge sound/video frequency data quantity, takes the pronunciation and the imagery processing compress technique then appears in the multimedia correspondences the great importance. Along with the multimedia communication and the ultra large scale integrated circuit (VLSI) the technical swift development, this technology will obtain a more ... -
Based on DSP audio frequency conference signal synthesis algorithm research
Sunday, July 5th, 2009 at 22:15 | No commentsCategories: DSPShort Content: Along with in the digital signal processing (DSP) algorithm and chip handling ability as well as aspect and so on communications network architecture optimization unceasing development, the modernized correspondence already rapidly popularized. The audio frequency conference is the numerous communications system's necessary function. Has many user participation audio frequency conference, the simple the pattern may use under the token control the incompatible pattern, enables only then to have right to speak that people in attendance only then to be possible ... -
Based on DSP digital hearing aid development
Sunday, June 14th, 2009 at 15:48 | No commentsCategories: DSPShort Content: 1st, the digital hearing aid development is the inevitable technical support Hearing aid's design has the strict specification. The hearing aid must the enough small volume (in order to put in person ear or its behind), the extremely low movement power loss, and do not introduce the noise or the distortion. In order to satisfy these requests, the existing hearing aid consumption's electric current is lower than 1mA, the working voltage is 1V, and does not take the silicon ... -
Based on DSP digital pronunciation compression system
Wednesday, June 10th, 2009 at 22:55 | No commentsCategories: DSPShort Content: Regardless of the pronunciation digital communication in the reliability, antijamming ability, the secrecy or the price aspect far surpasses the simulation voice signal, but this is takes the broadband band width take the channel as the price. Therefore to reduce the band width which or the storage space the pronunciation signal cabin takes, must carry on the compressed encoding to the digit voice signal. An outstanding pronunciation compression system request can while the software and hardware resources take the proportion ... -
Multimedia handset’s power source management plans
Thursday, April 23rd, 2009 at 03:59 | No commentsCategories: Power SupplyShort Content: The handset television, the handset game as well as the audio frequency broadcast and so on multimedia applications presented the huge challenge to handset's in power source management design. The handset designers need while to join the new multimedia function, maintains the handset exquisite contour and maintains battery's long life. Has provided the splendid new function newly using the processor, but the price is the power loss is higher. The new AV function means that music playbacking time is longer, ... -
In next generation handset’s power source management division plan
Wednesday, April 22nd, 2009 at 02:59 | No commentsCategories: Power SupplyShort Content: The third generation (3G) handset may provide has multi-purpose each characteristics. When the consumer enjoys these communication facility is newest and better function time, they also continue to request the single battery's operating time to be longer, handset's external dimensions to be younger. Although the IC integration may help the solution size question, but simultaneously also will increase the design order of complexity and limits the design flexibility. Now handset project engineer must consider that many kinds of factors come ... -
Uses DS80C400 the establishment network multimedia application
Tuesday, December 9th, 2008 at 11:42 | No commentsCategories: Communication NetworksShort Content: High speed development which changes with each new day along with the electronic information technology, the exciting multimedia application, including the wired public address system (PA-Public address system), demands and so on network gate, MP3 player as well as security camera is also grows day by day. In networking development's today, may use one kind of low cost network microprocessor DS80C400 to establish with realizes. Its characteristic does not need any hardware's image compression, then may each second transmit 4 ... -
Provides 12Vp-p with the 3V power source for the piezoelectricity type speaker voltage - 51RD the Chinese electronic net
Saturday, December 6th, 2008 at 23:09 | No commentsCategories: Power SupplyTags: speakerShort Content: The short piezoelectricity type speaker may provide the high quality sound for the portable electronic installation, but the request adds in the speaker part both sides voltage amplitude of vibration is bigger than 8V p-p. But, the majority mobile equipments only then a low pressure power source, the traditional battery power supply amplifier is unable to provide enough great voltage amplitude of vibration to actuate the piezoelectricity type speaker. Solves this question one method is uses Figure 1 IC1, you ... -
HD Radio receiver’s design
Saturday, December 6th, 2008 at 21:29 | No commentsCategories: Communication NetworksShort Content: HD Radio (High-Definition Radio) is one kind of digit broadcast technique, but differs from with the satellite broadcast. The satellite broadcast receives the 2.3GHz frequency range directly the satellite signal, but the HD Radio operating frequency and current assigns for AM and the FM broadcasting station's frequency is the same. Using the Orthogonal Frequency Division Multiplexing (OFDM) digital technique, HD Radio the new digital signal will lay aside in existing AM and in above FM sideband's any. In the AM ... -
MAXQ3120 composite signal micro controller’s application case
Sunday, November 30th, 2008 at 15:12 | No commentsCategories: SCMShort Content: Supervisory system's designer and the manufacturer has hoped the micro controller can provide the general function which for the daily surveillance application increases unceasingly, including uses electricity satisfiedly aspect and so on measurement, automobile monitoring, data gathering and sensor adjustment requests. maxq3120 is to satisfy the low power loss which, the high speed micro controller these requests develop. Its major technique standard is as follows. •16, each second 8 1,000,000 instruction (8mips), monocycle risk nucleus •32kb dodges saves (the flash ...
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