parakeet-ctc-1.1b
by nvidia
Fast Conformer CTC model for high-throughput English speech recognition
nvidia/parakeet-ctc-1.1bmixpeek://transcription@v1/nvidia_parakeet_ctc_1b_v1Overview
Parakeet CTC 1.1B is NVIDIA's XXL Fast Conformer model with a CTC decoder, trained on 64K hours of English speech. The convolutional-transformer hybrid architecture processes audio up to 11 hours in a single pass on an A100 80GB GPU, achieving a real-time factor of 1,336x (1,336 hours of audio transcribed per hour of compute).
On Mixpeek, Parakeet CTC powers high-throughput English transcription for large audio and video libraries where speed matters. Its non-autoregressive CTC decoding enables massive parallelism, making it ideal for batch processing millions of hours of content.
Architecture
Fast Conformer encoder (CNN + Transformer hybrid) with 1.1B parameters and CTC (Connectionist Temporal Classification) decoder. Processes 80-channel log-mel spectrograms. Supports local attention for processing audio segments up to 11 hours on A100 80GB.
Mixpeek SDK Integration
import { Mixpeek } from "mixpeek";
const mx = new Mixpeek({ apiKey: "API_KEY" });
// Managed: create a collection over a bucket; Mixpeek runs this model's extractor
const collection = await mx.collections.create({
namespace_id: "my-namespace",
collection_name: "my-collection",
source: { type: "bucket", bucket_ids: ["bkt_your_bucket"] },
feature_extractor: {
feature_extractor_name: "transcription",
version: "v1",
parameters: { model_id: "nvidia/parakeet-ctc-1.1b" },
},
});Capabilities
- 1,336x real-time transcription speed
- Processes up to 11 hours of audio in a single pass
- Low WER on standard English benchmarks
- Non-autoregressive CTC decoding for parallel inference
- Greedy decoding without external language model
Use Cases on Mixpeek
Benchmarks
| Dataset | Metric | Score | Source |
|---|---|---|---|
| LibriSpeech test-clean | WER | 1.83% | NVIDIA, 2024: Parakeet model card |
| AMI Meeting Corpus | WER | 15.62% | NVIDIA, 2024: Parakeet model card |
Performance
Non-autoregressive CTC decoder enables massive batch parallelism
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Specification
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