Upload ckpt & readme

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LICENSE

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+// Copyright 2025 ByteDance Ltd. and/or its affiliates.
+// All rights reserved.
+// Licensed under the BSD 3-Clause Clear License (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// https://choosealicense.com/licenses/bsd-3-clause-clear/
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted (subject to the limitations in the disclaimer
+// below) provided that the following conditions are met:
+
+// * Redistributions of source code must retain the above copyright notice,
+// this list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above copyright notice,
+// this list of conditions and the following disclaimer in the documentation
+// and/or other materials provided with the distribution.
+// * Neither the name of ByteDance Ltd. and/or its affiliates Communications, Inc nor the names of its
+// contributors may be used to endorse or promote products derived from this
+// software without specific prior written permission.
+
+// NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED BY
+// THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+// CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT
+// NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+// PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+// OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

README.md

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----
-license: bsd-3-clause-clear
----
+<!-- Copyright 2025 ByteDance Ltd. and/or its affiliates.
+All rights reserved.
+Licensed under the BSD 3-Clause Clear License (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+https://choosealicense.com/licenses/bsd-3-clause-clear/
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted (subject to the limitations in the disclaimer
+below) provided that the following conditions are met:
+
+* Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+* Redistributions in binary form must reproduce the above copyright notice,
+this list of conditions and the following disclaimer in the documentation
+and/or other materials provided with the distribution.
+* Neither the name of ByteDance Ltd. and/or its affiliates nor the names of its
+contributors may be used to endorse or promote products derived from this
+software without specific prior written permission.
+
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED BY
+THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT
+NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. -->
+
+<div align="center">
+
+# **NEVC-1.0** <br>(EHVC: Efficient Hierarchical Reference and Quality Structure for Neural Video Coding)
+
+<div align="center">
+<img src="./assets/performance.png" alt="Performance comparison" width="60%" style="max-width: 100%;" height="auto">
+</div>
+
+</div>
+
+<div align="left">
+
+## 📝 Introduction
+This repository provides the pretrained model weights for **NEVC-1.0**, which integrates contributions from **EHVC (Efficient Hierarchical Reference and Quality Structure for Neural Video Coding)** — one of the core components of the framework.  
+**EHVC** introduces a hierarchical reference and quality structure that significantly improves both compression efficiency and rate–distortion performance.  
+The corresponding code repository can be found here: [NEVC-1.0-EHVC](https://github.com/bytedance/NEVC).
+
+Key designs of **EHVC** include:
+- **Hierarchical multi-reference:** Resolves reference–quality mismatches using a hierarchical reference structure and a multi-reference scheme, optimized for low-delay configurations.  
+- **Lookahead mechanism:** Enhances encoder-side context by leveraging forward features, thereby improving prediction accuracy and compression.  
+- **Layer-wise quantization scale with random quality training:** Provides a flexible and efficient quality structure that adapts during training, resulting in improved encoding performance.  
+
+---
+
+## 🔧 Models
+EHVC uses two models: the intra model and the inter model.  
+- The **intra model** handles intra-frame coding.  
+- The **inter model** is responsible for inter-frame (predictive) coding.
+
+### Intra Model
+The main contributions of NEVC-1.0 focus on inter coding.  
+For intra coding, we directly adopt the pretrained model **`cvpr2023_image_psnr.pth.tar`** from [DCVC-DC](https://github.com/microsoft/DCVC/blob/main/DCVC-family/DCVC-DC/checkpoints/download.py), without further training.
+
+### Inter Model
+The inter model of NEVC-1.0 is provided at **`/models/nevc1.0_inter.pth.tar`**.  
+The architecture of the inter model is illustrated below:
+
+<div align="center">
+<img src="./assets/architecture.png" alt="Inter model architecture" width="50%" style="max-width: 100%;" height="auto">
+</div>
+
+---
+
+##  📊  Experimental Results
+### Objective Comparison
+<div align="center">
+
+**BD-Rate (%) comparison for PSNR**  
+Anchor: VTM-23.4 LDB.  
+All codecs tested with 96 frames and intra-period = 32.  
+
+<img src="./assets/96F32G.png" alt="BD-Rate 96F32G" width="50%" style="max-width: 100%;" height="auto">
+
+**Rate–Distortion curves** on HEVC B, HEVC C, UVG, and MCL-JCV datasets.  
+Tested with 96 frames and intra-period = 32.  
+
+<img src="./assets/96F32G_curve.png" alt="RD curves 96F32G" width="80%" style="max-width: 100%;" height="auto">
+
+**BD-Rate (%) comparison for PSNR**  
+Anchor: VTM-23.4 LDB.  
+All codecs tested with full sequences and intra-period = -1.  
+
+<img src="./assets/allF-1G.png" alt="BD-Rate allF-1G" width="50%" style="max-width: 100%;" height="auto">
+
+**Rate–Distortion curves** on HEVC B, HEVC C, UVG, and MCL-JCV datasets.  
+Tested with full sequences and intra-period = -1.  
+
+<img src="./assets/allF-1G_curve.png" alt="RD curves allF-1G" width="80%" style="max-width: 100%;" height="auto">
+
+</div>
+
+---
+
+## 📜 Citation
+If you find **NEVC-1.0** useful in your research or projects, please cite the following paper:
+
+- **EHVC: Efficient Hierarchical Reference and Quality Structure for Neural Video Coding**  
+  Junqi Liao, Yaojun Wu, Chaoyi Lin, Zhipin Deng, Li Li, Dong Liu, Xiaoyan Sun.  
+  *Proceedings of the 33rd ACM International Conference on Multimedia (ACM MM 2025).*  
+
+```bibtex
+@inproceedings{liao2025ehvc,
+  title={EHVC: Efficient Hierarchical Reference and Quality Structure for Neural Video Coding},
+  author={Liao, Junqi and Wu, Yaojun and Lin, Chaoyi and Deng, Zhipin and Li, Li and Liu, Dong and Sun, Xiaoyan},
+  booktitle={Proceedings of the 33rd ACM International Conference on Multimedia},
+  year={2025}
+}
+```
+
+---
+
+
+## 🙌 Acknowledgement
+The intra model of this project is based on [DCVC-DC](https://github.com/microsoft/DCVC/blob/main/DCVC-family/DCVC-DC/checkpoints/download.py).

licenses/LICENSE-DCVC.txt

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+Copyright (c) Microsoft Corporation.
+
+MIT License
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED *AS IS*, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

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models/nevc1.0_intra.pth.tar

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