A Heterogeneous SoC for Soft Cast Wireless Video Transmission
Fengxiang Gao, Haoqi Ren, Zhifeng Zhang, Jun Hui Wu, Wei Yu, Jing Shen · 2018
Traditional wireless video transmission scheme picks a single bit rate and degrades sharply when the channel can't support the chosen bit rate. It is unacceptable to experience a cliff-edge effect when dealing with mobile and broadcast scenarios, which can lead to a rapid decline in signal's quality. SoftCast, a clean-slate scheme, provides a stable wireless video transmission scheme through joint coding of channel and source as well as adaptive decoding of receivers with channel qualities to avoid the cliff-edge effect. The best solution to meet mobile terminals' need for low power consumption and low latency is to implement a chip that meets these applications' requirements. We use SWIFT, an independently designed DSP, and dedicated hardware accelerators to implement a heterogeneous SoC (System on Chip) for SoftCast video transmission solution named Heterogeneous SoftCast SoC (HSS). HSS's software and hardware co-implementation scheme also reserves the space for subsequent improvement. The iterative upgrades of the system can solve the wireless video transmission's increasing requirements in the broadcast and mobile scenarios.