ProDiff further develops the approach by utilizing progressive distillation to reduce the number of sampling steps.ĭiffGAN-TTS adopts an adversarially-trained model to approximate the denoising function, enabling efficient speech synthesis. Although it produces high-quality audio, the inference speed is slowed down due to the large number of iterations in the reverse process. Grad-TTS formulates a stochastic differential equation (SDE) to gradually transform noise into a mel-spectrogram, employing a numerical ODE solver to solve the reverse SDE. And the ReFlow-TTS with one step sampling achieves competitive performance compared with existing one-step TTS models.ĭiff-TTS leverages a DDPM framework to convert a noise signal into a Mel-spectrogram through multiple diffusion time steps.ĭiffSpeech introduces a shallow diffusion mechanism to enhance voice quality and accelerate inference speed. Our experiments on LJSpeech Dataset show that our ReFlow-TTS method achieves the best performance compared with other diffusion based models. Specifically, our ReFlow-TTS is simply an Ordinary Differential Equation (ODE) model that transports Gaussian distribution to the ground-truth Mel-spectrogram distribution by straight line paths as much as possible.įurthermore, our proposed approach enables high-quality speech synthesis with a single sampling step and eliminates the need for training a teacher model. In this paper, we introduce ReFlow-TTS, a novel rectified flow based method for speech synthesis with high-fidelity. This drawback hinders its practical applicability in real-world scenarios. However, its effectiveness comes at the cost of numerous sampling steps, resulting in prolonged sampling time required to synthesize high-quality speech. Needless to say, I won't commit money to a team that can't prove to me that they are diligent in support and bug squashing.The diffusion models including Denoising Diffusion Probabilistic Models (DDPM) and score-based generative models have demonstrated excellent performance in speech synthesis tasks. Is this really such a complicated issue that the developers cannot solve? Can't they at least can provide us with stable work-arounds and assurances of an ultimate fix? The suggested workaround seems to be to confine oneself to notes where one has applied Format->Simply Formatting (hardly an acceptable long term solution), but even with this my notes occasionally "forget" the rule and fail to word wrap, ending up with single lines for each paragraph that flow far off the right edge of the screen on my iOS devices. I had resolved that once I got this corrected I would commit to Premium and, accordingly, more usage of Evernote.Īfter a little research I see that this is a long standing bug, with complaints going back at least to 2011. I was sure that I was doing something wrong when these texts, usually entered on my Mac, would lose their word wrap function on my iPad and iPhone. I was just thinking about upgrading to Premium, as I have come to use Evernote for more and more functions-only one of them being to handle various texts that I want to recall quickly. That is an unacceptable state of affairs for a program designed, as one of its primary functions, to work with "text notes." I have tried to explain the power of Evernote to them in what we do, the organisational abilities impress them, but fail every time when it comes to delivering our speeches. The iPad version has the nice Present feature, which would be perfect if you can simply just resize the text (and yes, I have tried to resize the text in the edit mode itself).Īll of my colleagues have tablets. When giving a speech making eye contact with the audience is fundamental, and having text that is too small makes it difficult to glance at the audience and glance back to find your place quickly again (plus some of my more visually challenged colleagues prefer their speech notes to be in large print). I recently bought an iPad Mini because I see that Evernote supports iOS more (more features, Penultimate, etc, etc) than android (I'm an android fan, so you must understand how much I appreciate the power of Evernote).įor some reason I cannot seem to resize the text on the iPad and have the text reflow or word wrap without it going beyond the size of the screen. ![]() When delivering a speech with my android tablet, I would simply open the note in non-edit mode and use pinch-zoom to resize the text to a manageable size and I'm good to go. I work in the political arena and use Evernote to both write and help deliver my speeches.
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