tag:blogger.com,1999:blog-19092890.post3705404539524098670..comments2024-03-28T17:41:43.970+02:00Comments on Image Sensors World: Sony Enhances MIPI D-PHY with Multiple Devices Connection CapabilityVladimir Koifmanhttp://www.blogger.com/profile/01800020176563544699noreply@blogger.comBlogger6125tag:blogger.com,1999:blog-19092890.post-49676295813176577012018-10-31T19:10:39.335+02:002018-10-31T19:10:39.335+02:00the sensors are tagged using virtual channels. the...the sensors are tagged using virtual channels. the state machine inside the sensor knows when its bus slot is available. It only works with global shutter.anoymoushttps://www.blogger.com/profile/18374651884403629423noreply@blogger.comtag:blogger.com,1999:blog-19092890.post-14439902405742360702018-10-30T02:51:56.677+02:002018-10-30T02:51:56.677+02:00I think the sensor at far end and at controller ar...I think the sensor at far end and at controller are terminated, others are not. anoymoushttps://www.blogger.com/profile/18374651884403629423noreply@blogger.comtag:blogger.com,1999:blog-19092890.post-32426357319084684462018-10-24T11:44:09.276+03:002018-10-24T11:44:09.276+03:00There is a number of coding options in MIPI, some ...There is a number of coding options in MIPI, some of them have very little overhead. Remember, there is no CDR in D-PHY, so coding is more flexible.Vladimir Koifmanhttps://www.blogger.com/profile/01800020176563544699noreply@blogger.comtag:blogger.com,1999:blog-19092890.post-88529747418685035242018-10-24T11:00:41.189+03:002018-10-24T11:00:41.189+03:00"1MP 120fps 10b sensor generates 1.2 Gbps of ..."1MP 120fps 10b sensor generates 1.2 Gbps of data". I do not think the DPHY sends only useful pixel data. You need some sort of coding of the data stream. The question is: what is the percentage of pixel data in the 2.5Gbps data stream? 70%? 80%?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-27515360168345982682018-10-23T20:43:50.886+03:002018-10-23T20:43:50.886+03:00In theory, D-PHY 1.2 can go as fast as 2.5Gbps per...In theory, D-PHY 1.2 can go as fast as 2.5Gbps per lane. Sony uses 2 lanes, so it's 5 Gbps aggregated. 1MP 120fps 10b sensor generates 1.2 Gbps of data, so that they could connect 4 sensors without slowdown.<br /><br />However, D-PHY is point-to-point interface that needs termination on both sides. If they just connect multiple sensors with no termination, the speed would be much slower than 2.5 Gbps.<br /><br />Possibly, they use each sensor as a re-translator in the chain where each sensor has both Rx and Tx D-PHYs. The Rx receives image data from its neighbor in a point to point manner. Then the sensor adds its own data and sends everything together through Tx to the next sensor in the chain. Vladimir Koifmanhttps://www.blogger.com/profile/13535931946133118344noreply@blogger.comtag:blogger.com,1999:blog-19092890.post-16639853722500823762018-10-23T08:10:05.690+03:002018-10-23T08:10:05.690+03:00Not being an expert on Mipi, I would guess that th...Not being an expert on Mipi, I would guess that the maximal framerate of 120fps would be lower the more cameras you add to the Mipi, or is Mipi generally not the bottle neck?Anonymousnoreply@blogger.com