Today to share the knowledge of mpeg wireless charging, which will also explain the wireless charging mcu, if you happen to solve the problem you are now facing, don't forget to pay attention to this site, start now!
< ul>1, wireless image transmission system from the application level is divided into two categories, one is fixed point image monitoring transmission system, the second is mobile video image transmission system. Fixed point wireless image monitoring transmission system, mainly used in wired closed circuit monitoring is inconvenient to achieve the occasion,Such as port monitoring system, river water conservancy video and data monitoring, forest fire monitoring system, urban security monitoring and so on.
2, wireless image transmission technology has not yet formed a mature industrialization model, but a wide range of application scenarios. This paper mainly discusses two types of wireless image transmission systems: fixed point image monitoring transmission system and mobile video image transmission system. Fixed-point monitoring systems are mainly used in situations where wired monitoring is inconvenient, such as port, water conservancy, forest fire prevention and urban security monitoring.
3, wireless image transmission system is divided into two categories according to the application: fixed point monitoring and mobile video transmissionLose. Fixed point monitoring system is mainly used in difficult to wire occasions, such as port, water conservancy, forest fire prevention, urban security and construction sites. 4 GHz band, such as frequency hopping or direct expansion technology, IEEE8011b standard can transmit 11 Mbit/s, 8011g can reach 54 Mbit/s, suitable for MPEG-4 image transmission.
4, microwave transmission: microwave transmission adopts frequency modulation or amplitude modulation method, the image is loaded on the high-frequency carrier, converted into high-frequency electromagnetic waves in the air transmission. Its advantages are low comprehensive cost, more stable performance and no wiringAnd cable maintenance costs. Twisted pair transmission: This transmission is to solve the electromagnetic environment is relatively complex, the occasion is a better solution, the monitoring image signal processing through a balanced and symmetrical transmission.
Table 1 International standards for image and video coding? JPEG (Joint Photographic Expert Group)? JPEG is a still image pressure developed by the ISO/IEC Joint Photo Expert GroupThe contraction standard is an international standard for compression algorithms for still images of continuous tones (including grayscale and color). There are four operating modes of JPEC algorithm, one is lossless compression algorithm based on spatial prediction (DPCM), and the other three are lossless compression algorithm based on DCT.
MPEG compression coding algorithm includes a series of compression methods such as intra-frame coding, inter-frame coding, DCT transform coding, adaptive quantization, entropy coding, motion estimation and motion compensation. In order to distinguish between intra-frame and inter-frame encoding, MPEG-2 defines three types of encoded images. The MPEG-1 standard is used for digitalThe encoding of the moving image and its accompanying sound on the storage body has a digit rate of 5Mb/s.
MPEG has different versions, including MPEG-MPEG-MPEG-3 and MPEG-4. Of these, MPEG-1 is the earliest version, originally designed for CD. MPEG-2 is widely used in digital television and high-definition movies, and is also the compression standard for DVDS. MPEG-3 does not actually exist because some of its features are integrated into MPEG-2 and MPEG-4.
【 Answer 】 : MPEG-1/2 video coding standardCoded images are divided into three types, which are called Intra-coded frames (I-coded frames) and P-coded frames (Predicfire-coded frames). Forward Predictive coding Frame) and B-frame (Bi-directional Predictive-coded Frame).
The MPEG standard includes MPEG-MPEG-2 and MPEG-4. MPEG-1 is widely used in VCD production, MPEG-2 is used in DVD production, HDTVAnd some demanding video editing processing. MPEG-4 standard is mainly used for video phone, video mail, electronic news, etc.
mpg is a video file format. The file extension of MPEG video is usually MPEG or MPG. MPEG is the international standard for moving image compression algorithms and is now supported by almost all computer platforms. There are five main MPEG standards, MPEG-MPEG-MPEG-7 and MPEG-21. MPEG-1 is widely used in the production of VCDS, absolutelyMost VCDS are compressed in MPEG-1 format.
1, Samsung w2016 mobile phone supports wireless charging function, but the use of wireless charging function requires a separate purchase of matching wireless charger. When using wireless charging, Samsung w2016 only needs to turn on the wireless charging function in the Settings, then connect the wireless charger to the power supply, and then place the back of the phone down in the center of the wireless charger.
2, Samsung W2016 built-in wireless chargeElectric coil, support wireless charging function. Samsung W2016 requires a separate wireless charger. W2016 Mobile phone: Wireless charger: wireless charging technology, derived from wireless power transmission technology.
3, Samsung W2016 built-in wireless charging coil, support wireless charging function. Wireless charger must be purchased separately. The Samsung W2016 supports GSM and CDMA2000 dual-network dual-standby, voice dual-channel and EVDO and WiFi/WAPI Internet dual-channel, global 5-band roaming. 16 megapixel rear camera, 5 megapixel front camera supports 20 "quick.That's the end of it. Did you find the information you needed? If you want to know more about this, remember to follow this site. < / p >