The student will acquire knowledge about audiovisual signal processing techniques for both audio and video, and will gain a general understanding of how digital audiovisual content signals should be processed. Additionally, the student will be equipped with the ability to stay updated on developments in science and technology, especially in this field, which is closely linked to a dynamic environment such as telecommunications in general and processing techniques in particular.

The course content is developed in both theoretical and practical parts as follows:

Theoretical Content (Lessons):

Lesson 1: Fundamentals of digital imaging. Perception, relationships between pixels, image geometry.

Lesson 2: 2D signal processing. 2D signal convolution. Neighborhood processing: masks.

Lesson 3: Audiovisual signal transforms. Fourier, FFT, Cosine, Hough, Walsh, Hadamard,... JPEG coding. Image compression algorithms.

Lesson 4: Image enhancement and analysis. Enhancements in spatial and temporal domains. Non-uniform illumination. Histograms. Contrast modification.

Lesson 5: Edge detection, morphology, geometric transformations, and segmentation. Edge detection, feature extraction, segmentation, recognition, interpretation, restoration.

Lesson 6: Feature extraction in images. Image classification and recognition. Deep Learning.

Lesson 7: Audio and video signal processing and editing. Linear video editing. Video compression.

Practical Content (Practices):

The practical block of the course consists of laboratory practices and exercises solved in class and is mandatory in nature.

Additionally, communication skills will be developed to convey information, ideas, problems, and solutions in the field of engineering and society in general through documentation delivery processes or oral presentations.

Regarding work organization, collaboration and teamwork will be encouraged through the design of the practical activities.

Practice 1: Programming tools and libraries for audiovisual processing.

Practice 2: Basic audiovisual signal processing. 2D convolution and spatial filtering. Neighborhood processing.

Practice 3: Image processing in transformed domains. Signal synthesis. Compression applications.

Practice 4: Implementation of image enhancement algorithms. Contrast and histogram modification. Image restoration libraries.

Practice 5: Edge detection, morphological processing, and geometric transformations. Thresholding and segmentation.

Practice 6: Image classification and deep learning.

Seminars:

As part of the activities to be carried out within Collective Tutoring, the following seminars are planned:

Seminar 1: Introduction to programming tools for image processing.

Seminar 2: Wavelet transform.

Seminar 3: Audio editing applications. Autotune.

   4o  

me traduces esto: Bloque teórico En el bloque teórico se desglosa en una serie de temáticas agrupadas donde se presenta el estado actual de diferentes tecnologías multimedia. Adicionalmente, se presentan las tendencias existentes, así como se proponen actividades que ahonden en la búsqueda y estudio de tecnologías multimedia emergentes.

Además, se dotará al alumno de la capacidad para estar al día en las novedades en ciencia y tecnología, sobre todo en este tipo de materias, tan ligadas a un entono tan dinámico como son las telecomunicaciones

De igual forma se desarrolla la capacidad de reconocer la necesidad de la formación continua propia y de emprender esta actividad a lo largo de su vida profesional de forma independiente.

Desarrollo del bloque teórico: Tema 1. Introducción a los sistemas multimedia.

Definición de sistemas multimedia. Cadena digital multimedia. Contenidos multimedia. Técnicas de codificación, modulación y transmisión utilizadas en señales multimedia. Tema 2. Sistemas de almacenamiento.

Almacenamiento óptico (DVD, CD, BR...). Almacenamiento en cinta. Almacenamiento estado sólido (flash, compact flash, SD,...). Almacenamiento en la red, almacenamiento en la nube. SSD Software-Defined Storage Tema 3. Estandares de distribución/conexión de video y audio.

Analógicos: Video compuesto, VGA, SCART... Digitales: DVI, HDMI, IE31394 FIREWIRE, USB, Thunderbolt,... Tema 4. Dipositivos portátiles multimedia.

Tabletas, Smart phones, consolas de juegos,... Aplicaciones de distribución y almacenamiento de contenidos multimedia. Tema 5. Sistemas de representación.

Pantallas y proyectores Tecnologías de pantallas planas (plasma, LCD, LED, OLED, QDOT, TV 3D,... Pantallas de tinta electrónica. Sistemas de representación para exteriores y grandes superficies. Tema 6. Sistemas de adquisición: cámaras.

Clasificación, accesorios e interfaces. Cámaras CCD y CMOS Tema 7. Sistemas AR y VR.

Dispositivos para AR/VR. Aplicaciones y entornos de desarrollo AR/VR. Bloque problemas/práctico. En el bloque problemas/práctico se desglosa en una serie de actividades agrupadas para diferentes sistemas multimedia en los campos de iluminación, sistemas de representación multimedia, distribución de contenidos multimedia y generación de contenidos audiovisuales. Una vez aprendidos estos elementos de forma aislada, deben integrarse en sistemas más complejos que permitan la interconexión de los mismos en un proyecto global. De esta forma, se dota al alumnado de la capacidad de gestionar complejas actividades técnicas o profesionales o proyectos de su especialidad, responsabilizándose de la toma de decisiones.

Además, se desarrollarán habilidades de comunicación información, ideas, problemas y soluciones en el ámbito de ingeniería y la sociedad en general a través de procesos de entrega de documentación o presentaciones orales.

Con respecto a la organización del trabajo, se fomentará la colaboración y trabajo en equipo a través del propio diseño de las prácticas.

Desarrollo del bloque problemas/prácticos:

Actividad 1. Sistemas de iluminación. Control de sistema de iluminación (focos) mediante diferentes herramientas SW y HW. Control MIDI y música. Protocolo DMX.

Actividad 2. Sistemas de audio . Grabación/reproducción de audio en sistemas portátiles. Sistema multimedia de grabación multicanal

Actividad 3. Sistemas audiovisuales. Estudio, instalación y configuración de un sistema multimedia de distribución de señales audiovisuales. Utilización de diferentes sistemas de representación. Utilización de cámaras de video profesionales para la captación en diferentes soportes de almacenamiento, formatos y utilización de interfaces.

Actividad 4. Sistemas de AR/VR. Herramientas de desarrollo, aplicaciones de AR/VR, puesta en funcionamiento de dispositivos AR/VR

Actividad 5. Sistemas Multimedia Avanzados. Desarrollo y exposición de trabajos/tareas vinculados a sistemas multimedia emergentes.

Seminarios Como parte de las actividades a realizar dentro de las Tutorías Colectivas (6 horas) se planifican los siguientes seminarios:

Seminario 1 . Software para la creación de contenido multimedia. Manipulación de menús, videos, audios, subtítulos. Sistemas de transcodificación de fuentes multimedia.

Seminario 2. Aplicaciones de Realidad Aumentada. Plataformas y ejemplos.

  ChatGPT

Certainly! Here is the translation to English:

Theoretical Block

In the theoretical block, various topics are presented, showcasing the current state of different multimedia technologies. Additionally, existing trends are discussed, and activities are proposed to delve into the search and study of emerging multimedia technologies.

Moreover, students will be equipped with the ability to stay updated on advancements in science and technology, especially in subjects that are closely linked to such a dynamic environment as telecommunications.

Likewise, the ability to recognize the need for continuous self-education and to undertake this activity independently throughout their professional life will be developed.

Development of the Theoretical Block:

Topic 1. Introduction to multimedia systems.

• Definition of multimedia systems.
• Digital multimedia chain.
• Multimedia content.
• Encoding, modulation, and transmission techniques used in multimedia signals.

Topic 2. Storage systems.

• Optical storage (DVD, CD, BR...).
• Tape storage.
• Solid-state storage (flash, compact flash, SD,...).
• Network storage, cloud storage.
• SSD Software-Defined Storage.

Topic 3. Standards for video and audio distribution/connection.

• Analog: Composite Video, VGA, SCART...
• Digital: DVI, HDMI, IE31394 FIREWIRE, USB, Thunderbolt,...

Topic 4. Portable multimedia devices.

• Tablets, smartphones, gaming consoles,...
• Applications for multimedia content distribution and storage.

Topic 5. Display systems.

• Screens and projectors.
• Flat panel display technologies (plasma, LCD, LED, OLED, QDOT, 3D TV,...).
• Electronic ink screens.
• Outdoor and large area display systems.

Topic 6. Acquisition systems: cameras.

• Classification, accessories, and interfaces.
• CCD and CMOS cameras.

Topic 7. AR and VR systems.

• Devices for AR/VR.
• Applications and development environments for AR/VR.

Practical/Problem Block

In the practical/problem block, a series of grouped activities are presented for different multimedia systems in the fields of lighting, multimedia representation systems, multimedia content distribution, and audiovisual content creation. Once these elements are learned in isolation, they should be integrated into more complex systems that allow for their interconnection in a comprehensive project. In this way, students are equipped with the ability to manage complex technical or professional activities or projects in their specialty, taking responsibility for decision-making.

Additionally, communication skills will be developed to convey information, ideas, problems, and solutions in the field of engineering and society in general through documentation delivery processes or oral presentations.

Regarding work organization, collaboration and teamwork will be encouraged through the design of the practical activities.

Development of the Practical/Problem Block:

Activity 1. Lighting systems.

• Control of lighting systems (spotlights) using different SW and HW tools. MIDI control and music. DMX protocol.

Activity 2. Audio systems.

• Audio recording/reproduction on portable systems. Multichannel recording multimedia system.

Activity 3. Audiovisual systems.

• Study, installation, and configuration of a multimedia system for audiovisual signal distribution. Use of different representation systems. Use of professional video cameras for capture on different storage media, formats, and interfaces.

Activity 4. AR/VR systems.

• Development tools, AR/VR applications, setup of AR/VR devices.

Activity 5. Advanced Multimedia Systems.

• Development and presentation of projects/tasks related to emerging multimedia systems.

Seminars

As part of the activities to be carried out within Collective Tutoring (6 hours), the following seminars are planned:

Seminar 1. Software for creating multimedia content. Manipulation of menus, videos, audios, subtitles. Transcoding systems for multimedia sources.

Seminar 2. Augmented Reality applications. Platforms and examples.

   4o  

me cambias topic por lesson y activity por practice?

  ChatGPT

Certainly! Here is the revised translation with "lesson" and "practice":

Theoretical Block

In the theoretical block, various topics are presented, showcasing the current state of different multimedia technologies. Additionally, existing trends are discussed, and activities are proposed to delve into the search and study of emerging multimedia technologies.

Moreover, students will be equipped with the ability to stay updated on advancements in science and technology, especially in subjects that are closely linked to such a dynamic environment as telecommunications.

Likewise, the ability to recognize the need for continuous self-education and to undertake this activity independently throughout their professional life will be developed.

Development of the Theoretical Block:

Lesson 1. Introduction to multimedia systems.

• Definition of multimedia systems.
• Digital multimedia chain.
• Multimedia content.
• Encoding, modulation, and transmission techniques used in multimedia signals.

Lesson 2. Storage systems.

• Optical storage (DVD, CD, BR...).
• Tape storage.
• Solid-state storage (flash, compact flash, SD,...).
• Network storage, cloud storage.
• SSD Software-Defined Storage.

Lesson 3. Standards for video and audio distribution/connection.

• Analog: Composite Video, VGA, SCART...
• Digital: DVI, HDMI, IE31394 FIREWIRE, USB, Thunderbolt,...

Lesson 4. Portable multimedia devices.

• Tablets, smartphones, gaming consoles,...
• Applications for multimedia content distribution and storage.

Lesson 5. Display systems.

• Screens and projectors.
• Flat panel display technologies (plasma, LCD, LED, OLED, QDOT, 3D TV,...).
• Electronic ink screens.
• Outdoor and large area display systems.

Lesson 6. Acquisition systems: cameras.

• Classification, accessories, and interfaces.
• CCD and CMOS cameras.

Lesson 7. AR and VR systems.

• Devices for AR/VR.
• Applications and development environments for AR/VR.

Practical/Problem Block

In the practical/problem block, a series of grouped activities are presented for different multimedia systems in the fields of lighting, multimedia representation systems, multimedia content distribution, and audiovisual content creation. Once these elements are learned in isolation, they should be integrated into more complex systems that allow for their interconnection in a comprehensive project. In this way, students are equipped with the ability to manage complex technical or professional activities or projects in their specialty, taking responsibility for decision-making.

Additionally, communication skills will be developed to convey information, ideas, problems, and solutions in the field of engineering and society in general through documentation delivery processes or oral presentations.

Regarding work organization, collaboration and teamwork will be encouraged through the design of the practical activities.

Development of the Practical/Problem Block:

Practice 1. Lighting systems.

• Control of lighting systems (spotlights) using different SW and HW tools. MIDI control and music. DMX protocol.

Practice 2. Audio systems.

• Audio recording/reproduction on portable systems. Multichannel recording multimedia system.

Practice 3. Audiovisual systems.

• Study, installation, and configuration of a multimedia system for audiovisual signal distribution. Use of different representation systems. Use of professional video cameras for capture on different storage media, formats, and interfaces.

Practice 4. AR/VR systems.

• Development tools, AR/VR applications, setup of AR/VR devices.

Practice 5. Advanced Multimedia Systems.

• Development and presentation of projects/tasks related to emerging multimedia systems.

Seminars

As part of the activities to be carried out within Collective Tutoring (6 hours), the following seminars are planned:

Seminar 1. Software for creating multimedia content. Manipulation of menus, videos, audios, subtitles. Transcoding systems for multimedia sources.

Seminar 2. Augmented Reality applications. Platforms and examples.

The development of large group and small group lectures will be focused on promoting quality teaching by giving priority to activities that foster inclusive and equitable learning (SDG-4).

Lectures in large group

 The methodology to be followed in the large group will be a mixture of introductory activities, master classes and the presentation of theory and general examples. In addition to theoretical contents of the subject, the ability to look for information and interpretation of data and handle complex concepts within telecommunications will be developed and enhanced to make judgments that imply reflection on ethical and social issues.

 The student must follow the teacher's presentation with the material available for this purpose, whether they are notes or a slide presentation, which must be completed with their own notes and with the subsequent review of the basic and/or recommended bibliography.

 Attendance, as well as active, respectful and responsible participation, either to raise doubts or to respond to the teacher's requirements or questions, will be evaluated positively in its corresponding factor.

 The student's autonomous work should focus on reviewing the concepts and theoretical aspects taught in class, carrying out exercises, as well as studying them with the material provided by the teacher, student notes and bibliography.

  

Small group classes

 They will consist of laboratory practices, theoretical/practical seminars in the laboratory or in the classroom where the application of theory to practice and the resolution of problems and exercises are shown.

 The student's work will focus on the development of the learning tasks assigned by the teacher, which culminate in the achievement of the objectives set for each session.

 

Attendance, as well as active, respectful and responsible participation, either to raise doubts or to respond to the teacher's requirements or questions, will be evaluated positively in its corresponding factor.

 Regarding the autonomous work, it will focus on the preparation of the documentation to be delivered for each practice, as well as on completing the work started in the laboratory and that could not be finished in the corresponding session. Special emphasis will be placed on the need for their own continuous training and to undertake this activity independently throughout their professional life, as well as on the ability to keep up to date with developments in science and technology.

 In addition, communication skills for information, ideas, problems and solutions in the field of engineering and society in general will be developed through task or oral presentations.

 Regarding the organization of work, collaboration and teamwork will be encouraged.

  

Collective tutorials

  The collective tutorials will be used in the resolution of doubts, monitoring and supervision of the work and exercises, as well as in the attendance and participation in the different seminars planned in the subject, as well as talks, conferences, workshops and/or conferences, designated by the teacher, in order to complete and update the training and obtain general, transversal and/or specific competences defined for this activity, such as the value of continuous training, entrepreneurship or the review of technological innovations in the matter.

 The attendance, as well as the active, respectful and responsible participation, in the aforementioned activities, will be evaluated according to the provisions of the evaluation system of this guide.

Students with special educational needs should contact the Student Attention Service (Servicio de Atención y Ayudas al Estudiante) in order to receive the appropriate academic support

1         Assessment System (detailed description)

 

1.1        Global Assessment

The Global Assessment modality will be carried out according to the outcomes of the activities described in the section "Methodology and activities", in addition to those described in the section "Detailed description of the Global Assessment" that will be weighted by considering the aspects and percentages detailed in the above table.

The Global assessment modality consists of two parts:

• The work assessment during the term, according to the tasks defined for this purpose.
• The completion of a FINAL EXAM on the day set for the exam during the evaluation period.

 

The distribution of the weights for each assessable aspect of the two aforementioned parts, and according to the activities described in the table above, is as follows:

 

Table 1. Weighting of the Global Assessment.

Aspect	Teaching term	Final exam	Total
S1 Assistance and participation	10 %	-	10 %
S2 Theoretical concepts	15 %	15 %	30 %
S3 Completion of work, study cases and exercises	15 %	15 %	30 %
S4 Laboratory/ computer practical work	30%		30 %
Course Total	70 %	30%	100%

 

Grades obtained in an aspect during the teaching term in the GLOBAL assessment will be maintained until the end of the academic year.

 

Final Exam:  At the end of the term, on the day set for the course within the exam period, there will be a final exam of the theoretical part and exercises of the course (aspects S2 and S3), in which students must demonstrate that they have acquired the competences and learning outcomes established for these aspects. The weight of this exam in the final grade will be 30% of the total, as reflected in the table "Weighting of the Global Assessment", with 15% corresponding to aspect S2 and the other 15% to aspect S3. The specific conditions, as well as the material and/or documentation that may be used in the final exam will be established by the lecturer.

 

Final Assessment

In order to pass the course, students must obtain a grade equal to or higher than 5.0 out of 10 in the overall results considering all the assessed aspects, provided that they have obtained a grade equal to or higher than 4.0 in the final exam and in the laboratory/computer practical part (S4).

Students will have the option of resigning the GLOBAL evaluation, and it will not be possible to return to it once the resignation has been made.

 

1.2        Final Exam

In the FINAL EXAM modality, an exam will be held on the day set for the course within the exam period, which will cover all the course contents, ensuring that students have acquired the competences and learning outcomes established for the course. The two parts of this written exam are weighed as follows:

- Part 1: Attendance and participation, theoretical concepts and completion of study cases or exercises assignments (S1, S2, and S3): 70%.

- Part 2: Laboratory/ computer practical work (S4): 30%.

The specific conditions, as well as the material and/or documentation that may be used in the Final Exam will be established by the lecturer.

In order to pass the course, students must obtain a grade equal to or higher than 5.0 out of 10 in each of the two parts.

Students who have passed the S4 aspect (laboratory/computer practical work) of the course, through GLOBAL ASSESMENT, with a grade equal to or higher than 5.0 out of 10, will not have to take Part 2 corresponding to this aspect in the exam. The same grade obtained in the GLOBAL ASSESTMENT will be assigned to this part.

The parts passed at each exam attempt will be maintained until the end of the academic year.

Teaching methodology and learning activities

 

Learning activities	Format	Teaching methodology Description
A1. Lectures with big group of students	100% in person class	Participatory master class sessions, lasting one or two hours each, held in the classroom.
A2. Lectures with practical groups	100% in person class	Development of practical sessions, lasting two hours each, in laboratories.

 

Schedule

The schedule can vary mainly due to the change from multi-modal scenario to the online one.

 

Evaluation system

There are no changes in the evaluation format (weights of each section) or in what is specified in the detailed evaluation.

Since the evaluation of the subject is continuous, there will only be an exam in the event that the student opts for the Single Test Evaluation, which is summarized in the following tables:

Ordinary call

Evaluation	Format	Description	Percentage
Final exam evaluation	In-person	This kind of evaluation is based in only one written exam that evaluates all the aspects of the subject, by assessing the students' acquisition of all the competences and learning outcomes established in the subject. This exam will take place during the Examination period on a date established by the centre.	S1, S2 and S3: 70% S4: 30%

 

Extraordinary call

Evaluation	Format	Description	Percentage
Final exam evaluation	In-person	This kind of evaluation is based in only one written exam that evaluates all the aspects of the subject, by assessing the students' acquisition of all the competences and learning outcomes established in the subject. This exam will take place during the Examination period on a date established by the centre.	S1, S2 and S3: 70% S4: 30%

 

Resources

Given that the attendance in the large group lectures and in the classes in practice groups is 100%, no exceptional resources are foreseen for them.

  

Teaching methodology and learning activities

 

Learning activities	Format	Teaching methodology Description
A1. Lectures with big group of students. - Synchronous classes by videoconference. - Asynchronous classes based on videos and / or audiovisual content, forums, interactive material, etc.	Online	The sessions of participative face-to-face classes, of one or two hours each, are replaced by other activities carried out through the Internet such as:-  - Classes by videoconference or in virtual classroom - Visualization of videos with explanation of the theoretical contents. - Review of interactive material on the subject. - Review of content on the Internet (forums, - specialized websites)
A2. Lectures with practical groups	Online	Practical sessions are replaced by online training activities, of two hours each, by other activities carried out through the Internet such as: - Virtualized or simulation activities. - Visualization of videos with explanation of the practical contents. - Review of interactive material about practices. - Online content review (forums, specialized websites, etc.)

 

Schedule

The schedule can vary mainly due to the change from multi-modal scenario to the online one.

Evaluation system

There are no changes in the evaluation format (weights of each section) or in what is specified in the detailed evaluation.

Since the evaluation of the subject is continuous, there will only be an exam in the event that the student opts for the Single Test Evaluation, which is summarized in the following tables:

Ordinary call

Evaluation	Format	Description	Percentage
Final exam evaluation	Online	This kind of evaluation is based in only one written exam that evaluates all the aspects of the subject, by assessing the students' acquisition of all the competences and learning outcomes established in the subject. This exam will take place during the Examination period on a date established by the centre.	S1, S2 and S3: 70% S4: 30%

 

Extraordinary call

Evaluation	Format	Description	Percentage
Final exam evaluation	Online	This kind of evaluation is based in only one written exam that evaluates all the aspects of the subject, by assessing the students' acquisition of all the competences and learning outcomes established in the subject. This exam will take place during the Examination period on a date established by the centre.	S1, S2 and S3: 70% S4: 30%

 

Resources

Since all the teaching, either in the exposition classes in large groups or in the classes in practice groups, be taught online, the following resources will need to be used:

Common telematic resources (teachers and students):

- PC equipment or similar.

- Videoconference system or virtual classroom, such as Google Meet or BigBlueButton.

- Use of interactive tools: screen sharing to use comments as a virtual whiteboard in PDF presentations.

- Use of the teaching platform of the University of Jaén: messaging, forums, tasks, activities and means of evaluation.

 

Institution in charge of data processing: Universidad de Jaén, Campus Las Lagunillas, s/n, 23071 Jaén

Data Protection Delegate: dpo@ujaen.es

Purpose: In accordance with the Universities Law and other national and regional regulations in force, carrying out exams and assessment tests corresponding to the courses students are registered in. In order to avoid frauds while sitting the exam, the exam will be answered using a videoconference system, being able the academic staff of the University of Jaén to compare and contrast the image of the person who is answering the exam with the student's photographic files. Likewise, in order to provide the exam with evidential content for revisions or claims, in accordance with current regulation frameworks, the exam will be recorded and stored.

Legitimacy: compliance with legal obligations (Universities Law) and other national and regional regulations currently in force.

Addressees: service providers who are the owners of the platforms where the exams are carried out and with whom the University of Jaén has signed the corresponding data access contracts.

Storage periods: those established in current in force regulations. In the specific case of exam videoconference recordings, not before the examination records and transcripts are closed or the exam can still be reviewed or challenged.

Rights: you can exercise your right of access, amendment, cancellation, opposition, suppression, limitation and portability by sending a letter to the postal or electronic address indicated above. In the event that you consider that your rights have been violated, you may submit a complaint to the Andalusian Council for Transparency and Data Protection www.ctpdandalucia.es

Person in charge: Universidad de Jaén, Paraje Las Lagunillas, s/n; Tel.953 212121; www.ujaen.es

Data protection delegate (DPO): TELEFÓNICA, S.A.U. ; Email: dpo@ujaen.es

Procedure aim: To manage proper recordings of teaching sessions with the aim of facilitating learning process under a multimodal and/or online teaching

Period for record storage: Images will be kept during legal term according to regulations in force

Legitimacy: Data will be managed according to legal regulations (Organic Law 6/2001, December 21, on Universities) and given consent provided by selecting corresponding box in legal admission documents

Data recipients (transfers or assignments): Any person allowed to get access to every teaching modality

Rights: You may exercise your rights of access, rectification, cancellation, portability, limitation of processing, deletion or, where appropriate, opposition. To exercise these rights, you must submit a written request to the Information, Registration and Electronic Administration Service of the University of Jaen at the address above, or by e-mail to the address above. You must specify which of these rights you are requesting to be satisfied and, at the same time, you must attach a photocopy of your ID card or equivalent identification document. In case you act through a representative, legal or voluntary, you must also provide a document that proves this representation and identification. Likewise, if you consider that your right to personal data protection has been violated, you may file a complaint with the Andalusian Data Protection and Transparency Council www.ctpdandalucia.es