Managing Video Storage / Compression Formats

A codec is a device or program that is used to encode or decode digital data streams or signals. It is responsible for compressing and decompressing data to reduce file sizes and enable efficient transmission and storage. Therefore, the statement that a device or program for encoding or decoding a digital data stream or signal is called a codec is true.

M-JPEG stands for Motion-JPEG, which is a digital video format that consists of a series of individual JPEG images. Each image represents a frame of the video, allowing for high-quality and efficient compression. Therefore, the statement that M-JPEG is a digital video format made up of a series of unique JPEG images is correct.

1 megabyte

PNG (Portable Network Graphics) is a bitmap graphics format that has been designed to replace GIF (Graphics Interchange Format). PNG offers better compression and supports more colors compared to GIF. It also supports transparency and allows for lossless compression, meaning that the image quality is not compromised when the file size is reduced. Therefore, PNG is the correct answer as it is the format specifically developed as an alternative to GIF.

H.264 is the newest compression format among the given options. It is a video compression standard that offers high-quality video compression with low bit rates. It is widely used for video streaming, video conferencing, and broadcasting. H.264 provides efficient compression by using advanced algorithms, resulting in smaller file sizes without compromising the video quality. This format has gained popularity due to its ability to deliver high-definition video content over various platforms and devices.

The statement is false because the larger the pixel size of an image, the larger the file size and the more storage space it requires. However, the quality of an image is determined by factors such as resolution, color accuracy, and sharpness, which are not solely dependent on the pixel size. Therefore, a larger pixel size does not necessarily mean better image quality.

The options a, b, and d are all well-known compression technologies. JPEG is a compression format for images, MPEG is a compression format for videos, and Wavelet is a compression technique used in various applications. However, there is no known compression technology called REMPG, making it the correct answer as the option that is not a compression technology.

Lossy compression is a technique used to reduce the size of data for storage, handling, and transmission. It achieves compression by removing unnecessary or irrelevant information from the data. This process results in a loss of some data, hence the term "lossy." Lossy compression is commonly used for multimedia files such as images, audio, and video, where a certain level of quality loss is acceptable in exchange for reduced file size. This technique allows for more efficient storage and faster transmission of data, making it ideal for applications with limited bandwidth or storage capacity.

Omitting part of the video signal that cannot be noticed by the human eye is called irrelevancy reduction. This process involves removing or reducing unnecessary information in the video signal to improve efficiency and reduce file size without significantly affecting the perceived quality of the video. Interlacing refers to a method of displaying video where alternate lines are displayed in each frame. Duplicity reduction and interspacial relevancy are not terms commonly used in video processing.

A resolution of 2048 x 1536 refers to the number of pixels that can be displayed on a screen or captured by a camera. In this case, multiplying the two numbers gives us a total of 3,145,728 pixels, which is approximately 3 million pixels. Therefore, the resolution of 2048 x 1536 is equivalent to 3 MP (megapixels).

The correct answer is b. 1984. This is the year when the first digital video coding standard was created. It marked a significant milestone in the development of video compression technology, paving the way for the digital video formats that we use today.

MPEG-4 Part 10 is also known as H.264. This video compression standard is widely used for high-quality video streaming and storage. It offers efficient compression while maintaining good video quality, making it popular for various applications such as video conferencing, broadcasting, and video surveillance.

CIF is known as both common intermediate format and common interchange format. The term CIF is used in various fields, such as video coding and telecommunications, to refer to a standardized format that allows for the exchange and compatibility of data between different systems. The common intermediate format is used in video coding, while the common interchange format is used in telecommunications. Therefore, the correct answer is c. Both A and B.

A 4CIF image is 2 times the height and width of CIF. This means that the 4CIF image has twice the number of pixels in both the height and width dimensions compared to a CIF image.

The 2CIF image size of 704 x 240 matches the 240 horizontal scan lines in a single field. This means that the image has a resolution of 704 pixels in the horizontal direction and 240 scan lines in the vertical direction. The term "2CIF" refers to a video resolution that is half the size of CIF (Common Intermediate Format), which has a resolution of 352 x 240. Therefore, the 2CIF image size of 704 x 240 has double the horizontal resolution while maintaining the same number of scan lines.