GPU-Accelerated Video Encoding - Nvidia

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CUDA and OpenCL • For the sub-pixel Motion Estimation precision CUDA provides textures with bilinear interpolation on access • CUDA provides direct access to <strong>GPU</strong> intrinsics • CUDA: C++, IDE (Parallel Nsight), Visual Studio Integration, ease of use • OpenCL kernels are not a magic bullet, they need to be fine-tuned for each particular architecture • OpenCL for CPU vs <strong>GPU</strong> will have different optimizations 67 PRESENTED BY
Tesla and Fermi architectures • All algorithms will benefit from L1 and L2 caches (Fermi) • Forget about SHMEM bank conflicts when working with 1-byte data types • Increased SHMEM size (Tesla = 16K, Fermi = up to 48K) • 2 Copy engines, Parallel kernel execution 68 PRESENTED BY
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GPU-Accelerated Video Encoding NVID
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Outline • Motivation • Video en
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Trends • GPU encoding is gaining
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Hybrid CPU-GPU encoding pipeline
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GPU Encoding Use Cases • Video en
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GPU Encoding Use Cases Helper libra
Page 17 and 18: Algorithm primitives • Fundamenta
Page 19 and 20: Reduce • Use half of N threads
Page 21 and 22: Reduce sample: 8 numbers 5 14 9 5 2
Page 23 and 24: Reduce sample: 8 numbers 33 14 19 5
Page 25 and 26: Scan sample: 8 numbers 2 9 5 1 3 6
Page 31 and 32: Compact • Having a vector of numb
Page 33 and 34: Compact sample The algorithm makes
Page 35 and 36: Algorithm primitives discussion •
Page 37 and 38: Intra Prediction 36 PRESENTED BY
Page 39 and 40: Intra Prediction • Select the rul
Page 41 and 42: Intra Prediction Plane Constant Ver
Page 43 and 44: CUDA: Intra Prediction 16x16 1. Loa
Page 45 and 46: CUDA: Intra Prediction 16x16 3. __d
Page 47 and 48: CUDA: Intra Prediction 16x16 4. Cal
Page 49 and 50: SAD and SATD • Sum of Absolute Tr
Page 51 and 52: Motion Estimation 50 PRESENTED BY
Page 53 and 54: Motion Estimation 52 PRESENTED BY
Page 55 and 56: Motion Estimation Motion vectors fi
Page 57 and 58: ME - Diamond search • Template me
Page 59 and 60: ME - Candidate Set • Objects that
Page 61 and 62: ME - 3D-wave • 3D-wave treats tim
Page 63 and 64: ME - GPU-friendly candidate set •
Page 65 and 66: ME - Hierarchical Search Algorithm:
Page 67: Outline • Motivation • Video en
Page 71 and 72: Multi-GPU encoding • N GOPs for N
Page 73 and 74: Outline • Motivation • Video en
Page 75 and 76: Recommended GTC talks We have a ple
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GPU-Accelerated Video Encoding - Nvidia

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