Papers › HMQ: Hardware Friendly Mixed Precision Quantization Block for CNNs
HMQ: Hardware Friendly Mixed Precision Quantization Block for CNNs
Hai Victor Habi, Roy H. Jennings, Arnon Netzer
Recent work in network quantization produced state-of-the-art results using mixed precision quantization. An imperative requirement for many efficient edge device hardware implementations is that their quantizers are uniform and with power-of-two thresholds. In this work, we introduce the Hardware Friendly Mixed Precision Quantization Block (HMQ) in order to meet this requirement. The HMQ is a mixed precision quantization block that repurposes the Gumbel-Softmax estimator into a smooth estimator of a pair of quantization parameters, namely, bit-width and threshold. HMQs use this to search over a finite space of quantization schemes. Empirically, we apply HMQs to quantize classification models trained on CIFAR10 and ImageNet. For ImageNet, we quantize four different architectures and show that, in spite of the added restrictions to our quantization scheme, we achieve competitive and, in some cases, state-of-the-art results.
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Tasks
Results from the paper archive 2025-07-28
| Task | Dataset | Model | Metric | Value | Rank at snapshot | Leaderboard | Report |
|---|---|---|---|---|---|---|---|
| Quantization | ImageNet | EfficientNet-B0-W8A8 | Activation bits | 8 | #13 of 27 | Archive leaderboard | report |
| Quantization | ImageNet | EfficientNet-B0-W8A8 | Top-1 Accuracy (%) | 76.4 | #13 of 27 | Archive leaderboard | report |
| Quantization | ImageNet | EfficientNet-B0-W8A8 | Weight bits | 8 | #13 of 27 | Archive leaderboard | report |
| Quantization | ImageNet | EfficientNet-B0-W4A4 | Activation bits | 4 | #14 of 27 | Archive leaderboard | report |
| Quantization | ImageNet | EfficientNet-B0-W4A4 | Top-1 Accuracy (%) | 76 | #14 of 27 | Archive leaderboard | report |
| Quantization | ImageNet | EfficientNet-B0-W4A4 | Weight bits | 4 | #14 of 27 | Archive leaderboard | report |
| Quantization | ImageNet | ResNet50-W3A4 | Activation bits | 4 | #15 of 27 | Archive leaderboard | report |
| Quantization | ImageNet | ResNet50-W3A4 | Top-1 Accuracy (%) | 75.45 | #15 of 27 | Archive leaderboard | report |
| Quantization | ImageNet | ResNet50-W3A4 | Weight bits | 3 | #15 of 27 | Archive leaderboard | report |
| Quantization | ImageNet | MobileNetV2 | Top-1 Accuracy (%) | 70.9 | #24 of 27 | Archive leaderboard | report |
Ranks are positions in the archive's leaderboards as they stood at the 2025-07-28 snapshot. Results published since then are not among these rows, so a rank here is not a current standing.
Methods
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