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Somnambulism, commonly known as sleepwalking, involves individuals engaging in activities ranging from simple walking to more complex behaviors such as driving. Sleepwalking typically occurs during the slow-wave sleep stages 3 and 4 early in the night when the person is not dreaming, contradicting the myth that sleepwalkers are acting out their dreams.
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In 1928, bacteriologist Frederick Griffith worked on a vaccine for pneumonia, which is caused by Streptococcus pneumoniae bacteria. Griffith studied two pneumonia strains in mice: one pathogenic and one non-pathogenic. Only the pathogenic strain killed host mice.
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Transformation01:26

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Microbial communities are dynamic environments where cell lysis releases free DNA into the surroundings. Other cells can take up this extracellular DNA through a process known as transformation.When a cell incorporates this foreign DNA into its genome, resulting in genetic modification, the process is known as transformation. Cells capable of this process are termed competent. Competence can be natural, as observed in certain bacteria and archaea, or artificially induced in the...
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Transformers01:26

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A device that transforms voltages from one value to another using induction is called a transformer. A transformer consists of two separate coils, or windings, wrapped around the same soft iron core. However, they are electrically insulated from each other.
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ATP-driven pumps, also known as transport ATPases, are integral membrane proteins. They have binding sites for ATP located on the membrane's cytosolic side and the ion-conducting domain in the transmembrane region. These pumps use the free energy released from ATP hydrolysis to move the solutes across cell membranes against an electrochemical gradient.
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The Ideal Transformer01:26

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In single-phase two-winding transformers, two windings are coiled around a magnetic core characterized by cross-sectional area A and magnetic permeability μ. A phasor current i1 enters the left winding while i2 exits the right winding, establishing the fundamental working of the transformer through electromagnetic principles.
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Video Experimental Relacionado

Updated: Jan 21, 2026

Light-driven Molecular Motors on Surfaces for Single Molecular Imaging
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Animación de rostros parlantes a partir de una sola imagen controlada por audio con Transformers

Yixin Li1, Xizhong Shen2

  • 1Department of Intelligent Technology, Shanghai Institute of Technology, 100 Haiquan Road, Shanghai, 201418, Fengxian District, China.

Scientific reports
|January 19, 2026
PubMed
Resumen
Este resumen es generado por máquina.

ExpNet genera videos realistas de rostros parlantes desacoplando el movimiento de la cabeza de las expresiones faciales. Este enfoque basado en Transformers mejora la sincronización de labios y la calidad del video, incluso con variaciones emocionales.

Palabras clave:
generación de video controlada por audioregresión de expresionessíntesis de rostros parlantesmodelo basado en Transformers

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Área de la Ciencia:

  • Visión por Computadora
  • Inteligencia Artificial
  • Interacción Humano-Computadora

Sus antecedentes:

  • La generación de video de rostros parlantes controlada por audio es vital para humanos virtuales y contenido digital.
  • Los métodos actuales luchan con movimientos de labios antinaturales y distorsiones faciales, especialmente durante expresiones emocionales.
  • Estos problemas provienen de la señal de audio que entrelaza el contenido lingüístico, la emoción y los atributos del hablante.

Objetivo del estudio:

  • Proponer ExpNet, un marco novedoso para la generación realista de video de rostros parlantes controlada por audio.
  • Abordar las limitaciones en los métodos existentes con respecto al realismo de las expresiones y la sincronización de labios.
  • Mejorar la calidad de los videos generados, particularmente bajo expresiones exageradas y variaciones emocionales.

Principales métodos:

  • Se utilizó un marco de regresión de expresiones basado en Transformers (ExpNet) que emplea coeficientes 3DMM.
  • Se implementó un autoencoder variacional (VAE) condicional para la generación de coeficientes de pose de cabeza.
  • Se empleó una arquitectura CNN-Transformer con sesgo de posición relativo basado en ALiBi para la regresión de coeficientes de expresión, condicionada al primer cuadro.

Principales resultados:

  • ExpNet demostró un rendimiento superior a los métodos existentes en realismo de expresiones, sincronización de labios y calidad de video en múltiples conjuntos de datos (HDTF, MEAD, LRS3).
  • Los estudios de ablación confirmaron la importancia de ALiBi, la supervisión de puntos de referencia y el módulo Transformer para la estabilidad temporal y la reducción del movimiento de labios.
  • El marco conservó con éxito la identidad y la coherencia emocional a lo largo de los videos generados.

Conclusiones:

  • ExpNet genera eficazmente videos de rostros parlantes de alta calidad al desacoplar el movimiento de la cabeza y las expresiones faciales.
  • El método propuesto ofrece mejoras significativas en realismo y sincronización en comparación con enfoques anteriores.
  • Componentes clave como ALiBi y los módulos Transformer son críticos para una animación facial robusta y coherente.