It137 - Multimedia - Quiz #2

Streamed audio refers to the process of playing an audio file while it is being downloaded, without having to wait for the entire file to be saved onto the computer. This allows for a seamless playback experience, as the audio can be heard in real-time as it is being received. Therefore, the statement "Streamed audio allows the sound file to be played as it is downloading and before the entire file is entirely saved into the computer" is true.

The statement is true because a test tone is designed to have a consistent and smooth waveform. This is important for technical purposes such as audio testing or calibration, as it allows for accurate measurement and analysis of equipment performance. A smooth wave ensures that the test tone is pure and free from distortion, making it an ideal choice for technical applications.

When a sound waveform hits a high point, it corresponds to molecules of air being packed together densely. This is because sound waves are created by the vibrations of an object, which cause the air molecules to move back and forth. When the waveform reaches a high point, it indicates that the air molecules are compressed and packed together tightly. This compression of air molecules is what creates the high-pressure areas in a sound wave. Therefore, the statement is true.

WAV and AVI are both file formats commonly used for audio and video files, respectively. They are both subsets of the RIFF (Resource Interchange File Format) specification, which is a file format container used to store multimedia data. This means that WAV and AVI files adhere to the RIFF structure and can be considered as specific types of RIFF files. Therefore, the statement "WAV and AVI are subsets of RIFF" is true.

In interlaced video, each frame is divided into two half-frames called fields. One field contains all the odd-numbered lines of the image, while the other field contains all the even-numbered lines. These fields are displayed alternately, creating the illusion of a full frame. Therefore, it is correct to say that a field is one of the two half-frames in interlaced video.

Tahoma is indeed an example of a Sans-Serif font. Sans-Serif fonts are characterized by their lack of serifs, which are small decorative strokes at the end of characters. Tahoma is a widely used Sans-Serif font that was designed specifically for use on computer screens. It has a clean and modern appearance, making it easy to read at small sizes. Its simple and straightforward design makes it a popular choice for digital content, such as websites and presentations.

A very loud sound is described by a high amplitude. Amplitude refers to the maximum displacement of a wave from its equilibrium position. In the case of sound waves, a higher amplitude indicates a greater intensity or volume of the sound. Therefore, a very loud sound would have a high amplitude.

Analog video is generally linear in nature because it represents continuous variations in brightness and color. Linear video means that the intensity of the signal is directly proportional to the intensity of the image being captured. This allows for a smooth and continuous representation of the visual information. Non-linear video, on the other hand, would involve a non-proportional relationship between the signal and the image, resulting in distortions or inconsistencies in the representation of the video. Therefore, the statement that analog video is generally non-linear is incorrect.

Wavelength is the distance between any point on a wave and the equivalent point on the next phase. It is a measure of the length of one complete wave cycle. In other words, it represents the distance traveled by a wave in one complete cycle. Wavelength is an important characteristic of a wave and is often used to determine the properties and behavior of waves in various applications, such as in physics, optics, and telecommunications.

The statement is incorrect. The dynamic range represents the difference between the highest and lowest levels of a signal that can be accurately recorded or reproduced without distortion. It is not the difference between the minimum signal and the noise floor of the system.

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An even field is referred to as the bottom field because in interlaced video formats, each frame is divided into two fields - one containing the even-numbered lines and the other containing the odd-numbered lines. The bottom field refers to the field that contains the even-numbered lines, while the top field refers to the field that contains the odd-numbered lines. Therefore, the given answer is correct.

The correct answer is "points" because type sizes are typically expressed in points, not pixels. Points are a unit of measurement commonly used in typography to determine the size of text. Pixels, on the other hand, are used to measure the resolution of digital displays. Therefore, the statement that type sizes are usually expressed in pixels is incorrect.

NTSC stands for National Television System Committee. It is an analog video display standard that was developed in the United States. NTSC has 525 horizontal scan lines drawn per frame, which is the characteristic mentioned in the question. PAL and SECAM are also analog video display standards, but they have different numbers of horizontal scan lines. HDTV, on the other hand, is a digital video display standard and is not relevant to the given question.

The correct answer is MPEG-1- Audio Layer 3. MP3 is a digital audio coding format that uses lossy data compression. It was developed by the Moving Picture Experts Group (MPEG) and is the third layer (Layer 3) of the MPEG-1 audio standard.

The term "scan lines" refers to the horizontal lines that make up the display on a screen. The vertical resolution, or the number of horizontal lines on the screen, determines the quality and clarity of the image displayed. The more scan lines there are, the higher the resolution and the better the image quality. Therefore, scan lines are directly related to the vertical resolution of a screen.

Anti-aliasing is the correct answer because it refers to the technique of blending the colors along the edges of the letters to create a smooth transition between the letters and the background. This helps to reduce the jagged or pixelated appearance of the text, resulting in a softer and more visually appealing look. Aliasing, on the other hand, refers to the jagged or pixelated appearance of text or graphics when they are displayed at low resolutions. Kerning refers to adjusting the spacing between individual characters in a text. Therefore, none of these options except anti-aliasing adequately explain the given statement.

DV standard, DV standards, and DV are all correct answers because they all refer to the ISO Standard for storing digital video in a digital format using tapes. The term "DV" is commonly used as an abbreviation for the ISO Standard, so all three variations are acceptable.

A DVD-10 is a type of DVD that is double-sided and single-layered, with a capacity of 8.75 GB. This means that it can hold data on both sides of the disc, but only has one layer on each side. The capacity of 8.75 GB refers to the amount of data that can be stored on the disc.

The resolution of a video is affected by factors such as bit depth, frame size, and aspect ratio. Therefore, the correct answer is "None of these" because all of the given options affect the resolution of a video.

The correct answer is "Text" because it refers to a collection of characters that are of a single size and style and belong to a particular typeface family. ASCII, Alphanumeric Codes, and None of these do not accurately describe a collection of characters in the same way that "Text" does.

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The given answer is correct because video frame rate refers to the number of individual frames that are displayed per second in a video. It is not related to the time it takes for the video to be transferred from the processor to the monitor. The term "data transfer rate" refers to the speed at which data is transferred from one device to another, while "data transfer" simply refers to the act of transferring data. Therefore, the correct answer includes both "data transfer rate" and "data transfer" as they are not synonymous with video frame rate.

The source frame rate refers to the rate at which the video was originally recorded or captured. This means that the correct answer is the speed at which the video is recorded.