docs: add vLLM-Omni serving references

Document vLLM-Omni as a production serving option for VoxCPM2
alongside the existing Nano-vLLM reference. Mirrors the addition in
README_zh.md, and adds an ecosystem table entry.

Install snippet follows the upstream vLLM-Omni installation guide
(from source, since vllm-omni is rapidly evolving).

Signed-off-by: Yueqian Lin <linyueqian@outlook.com>

README.md

@@ -46,7 +46,7 @@ VoxCPM is a **tokenizer-free** Text-to-Speech system that directly generates con
 - 🎙️ **Ultimate Cloning** — Reproduce every vocal nuance: provide both reference audio and its transcript, and the model continues seamlessly from the reference, faithfully preserving every vocal detail — timbre, rhythm, emotion, and style (same as VoxCPM1.5)
 - 🔊 **48kHz High-Quality Audio** — Accepts 16kHz reference audio and directly outputs 48kHz studio-quality audio via AudioVAE V2's asymmetric encode/decode design, with built-in super-resolution — no external upsampler needed
 - 🧠 **Context-Aware Synthesis** — Automatically infers appropriate prosody and expressiveness from text content
-- ⚡ **Real-Time Streaming** — RTF as low as ~0.3 on NVIDIA RTX 4090, and ~0.13  accelerated by [Nano-VLLM](https://github.com/a710128/nanovllm-voxcpm)
+- ⚡ **Real-Time Streaming** — RTF as low as ~0.3 on NVIDIA RTX 4090, and ~0.13 accelerated by [Nano-vLLM](https://github.com/a710128/nanovllm-voxcpm) or [vLLM-Omni](https://github.com/vllm-project/vllm-omni) — official vLLM omni-modal serving for VoxCPM2 with PagedAttention and an OpenAI-compatible API
 - 📜 **Fully Open-Source & Commercial-Ready** — Weights and code released under the [Apache-2.0](LICENSE) license, free for commercial use
 
 
@@ -262,6 +262,32 @@ server.stop()
 
 > **RTF as low as ~0.13 on NVIDIA RTX 4090** (vs ~0.3 with the standard PyTorch implementation), with support for batched concurrent requests and a FastAPI HTTP server. See the [Nano-vLLM-VoxCPM repo](https://github.com/a710128/nanovllm-voxcpm) for deployment details.
 
+### 🏭 Production Serving (vLLM-Omni)
+
+For production multi-tenant deployments, use [**vLLM-Omni**](https://github.com/vllm-project/vllm-omni) — the official vLLM project's omni-modal extension with native **VoxCPM2** support. PagedAttention KV cache, continuous batching, and a drop-in **OpenAI-compatible** `/v1/audio/speech` endpoint.
+
+```bash
+# Install from source (latest main — vllm-omni is rapidly evolving)
+uv pip install vllm==0.19.0 --torch-backend=auto
+git clone https://github.com/vllm-project/vllm-omni.git && cd vllm-omni
+uv pip install -e .
+```
+
+See the [vLLM-Omni installation guide](https://vllm-omni.readthedocs.io/en/latest/getting_started/installation/) for other platforms (ROCm, XPU, MUSA, NPU) and Docker images.
+
+```bash
+# Launch an OpenAI-compatible TTS server (--omni enables omni-modal serving)
+vllm serve openbmb/VoxCPM2 --omni --port 8000
+
+# Call it from any OpenAI client
+curl http://localhost:8000/v1/audio/speech \
+  -H "Content-Type: application/json" \
+  -d '{"model":"openbmb/VoxCPM2","input":"Hello from VoxCPM2 on vLLM-Omni!","voice":"default"}' \
+  --output out.wav
+```
+
+> Built on the upstream vLLM scheduler, with batched concurrent requests, streaming chunk delivery, and multi-GPU deployment out of the box. See the [VoxCPM2 example](https://github.com/vllm-project/vllm-omni/tree/main/examples/online_serving/voxcpm2) for full deployment recipes.
+
 > **Full parameter reference, multi-scenario examples, and voice cloning tips →** [Quick Start Guide](https://voxcpm.readthedocs.io/en/latest/quickstart.html) | [Usage Guide](https://voxcpm.readthedocs.io/en/latest/usage_guide.html) | [Cookbook](https://voxcpm.readthedocs.io/en/latest/cookbook.html)
 
 ---
@@ -528,6 +554,7 @@ Full documentation: **[voxcpm.readthedocs.io](https://voxcpm.readthedocs.io/en/l
 | Project | Description |
 |---|---|
 | [**Nano-vLLM**](https://github.com/a710128/nanovllm-voxcpm) | High-throughput and Fast GPU serving |
+| [**vLLM-Omni**](https://github.com/vllm-project/vllm-omni) | Official vLLM omni-modal serving for VoxCPM2 — PagedAttention, OpenAI-compatible API |
 | [**VoxCPM.cpp**](https://github.com/bluryar/VoxCPM.cpp) | GGML/GGUF: CPU, CUDA, Vulkan inference |
 | [**VoxCPM-ONNX**](https://github.com/bluryar/VoxCPM-ONNX) | ONNX export for CPU inference |
 | [**VoxCPMANE**](https://github.com/0seba/VoxCPMANE) | Apple Neural Engine backend |