Low power multi-lane MIPI CSI-2 receiver design and hardware implementations

Lu, Yueh-Chuan; Chen, Zong-Yi; Chang, Pao-Chi

doi:10.1109/isce.2013.6570183

Cited by 4 publications

(2 citation statements)

References 3 publications

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“…In the case of image sensors (cameras), the most widely adopted serial protocols are those developed by the MIPI alliance [16]. Currently, the Camera Serial Interface (CSI-2) is the de facto standard for these sensors, in both prototyping and consumer electronic devices, due to its good trade-off between high speed and cost effectiveness [17]. CSI-2 is commonly combined with a physical level protocol called D-PHY [18], based on Low Voltage Differential Signaling (LVDS) pairs, with separate physical lanes for data (a maximum of 4) and for a Double Data Rate (DDR), source synchronous clock.…”

Section: Integration With Standard Protocolsmentioning

confidence: 99%

Zero-Transition Serial Encoding for Image Sensors

2017

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Off-chip serial buses are the most common interfaces between sensors and processing elements in embedded systems. Due to their length, these connections dissipate a large amount of energy, contributing significantly to the total consumption of the system. The error-tolerant feature of many sensor applications can be leveraged to reduce this energy contribution by means of an approximate serial data encoding. In this paper we propose one such encoding called Serial T0, particularly effective for image sensors data. By exploiting the correlation among pixels colors, Serial T0 significantly reduces the energy dissipation on a serial connection, with minimal impact on image quality, and extremely low codec overheads. Moreover, it allows runtime quality reconfiguration, and can be integrated with standard serial protocols (SPI, I2C, CSI-2, etc.) without requiring modifications to legacy peripherals. We show that Serial T0 is superior to both accurate and approximate state-of-the-art encodings, not only in terms of pure energy saving, but also when combined with realistic error tolerant applications (OCR and face recognition). In the best case, the energy on the bus can be reduced of more than 75% with less than 4% maximum error on the decoded data.

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Section: Integration With Standard Protocolsmentioning

confidence: 99%

Zero-Transition Serial Encoding for Image Sensors

2017

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“…1 as in the data transmission process diagram, high-speed data transmit in clock triggering.the state state and the end state for data transmission is LP-11, clock enter the high-speed mode after leaving the state of rest through a transmission start state (SOT): LP11-LP01-LP00. clock signal must enter the high-speed mode before triggering of the high-speed data transmission in order to provide the DDR clock with data and must keep the high speed data transmission over to stop the clock signal.the transmission end state (EOT) :LP00-LP11.Similarly, data channel first transmit a start state(SOT) after leaving the state of rest and then transmit a eight bit sequence:00011101, then began to transfer valid bit and enter into the high-speed mode [7]. F．When in high-speed mode transmitting waveform 000111, measuring the rise time of Tr, the measuring range is from 20% to 80% of VOD voltage .…”

Section: Transmission Characteristics Based On D-phymentioning

confidence: 99%

The Analysis of the Transmission Signal Measured MIPI D-PHY

Wei

Zhang

2014

AMR

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Analysis the characteristics of the measured transmission signal of Mobile Industry Processor Interface (MIPI) Display Serial Interface Physical Layer (D-PHY) interface based on a project platform. Firstly, introduces the transmission characteristics and mutual conversion process of physical layer about high-speed and low power mode, and by the transmission signal measured a platform of high-speed mode, present the D-PHY transmission signal each test items and test point selection, make the phone run smoothly and screen display normally, this test analysis certain practicability and expansibility.

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