Errata
The errata list is a list of errors and their corrections that were found after the product was released.
The following errata were submitted by our customers and have not yet been approved or disproved by the author or editor. They solely represent the opinion of the customer.
Color Key: Serious technical mistake Minor technical mistake Language or formatting error Typo Question Note Update
Version | Location | Description | Submitted by | Date submitted |
---|---|---|---|---|
ePub | Page 1 1 |
Hi, |
Tobias Köck | May 12, 2016 |
Page 10 Para commencing "Since each.... |
the word in is repeated showing "in in our current....." |
Biterg | Jun 24, 2016 | |
Page 11 towards bottom |
Binary to decimal description is WRONG. |
Biterg | Jun 24, 2016 | |
Printed | Page 15 paragraph text |
"which interestingly enough, is exactly the binary representation" |
Eric Lawrence | Aug 12, 2016 |
Printed | Page 16 First equation |
I haven't done "real" math in a long time, but isn't there an extra minus sign in: |
Eric Lawrence | Aug 12, 2016 |
ePub | Page 17 about BWT |
Hi, |
Kelvin Kredens | Jun 13, 2016 |
Page 21 3rd paragraph |
iPod was introduced in 2001, not 1998. I remember because the original iMac came out in ’98, and the iPod / CD-RW were after that, when Apple was pitching the Mac as the “digital hub” of our homes. |
significant.bit | May 29, 2016 | |
Printed | Page 21 Just before end of section |
The phrase: |
Eric Lawrence | Aug 12, 2016 |
Page 23 caption for Figure 2-2 |
a couple of issues: “Lenna” and the phrase “full portrait:” repeated. |
significant.bit | May 29, 2016 | |
Page 30 1st paragraph |
Hi, your book is really intearsting, the error I foun in page 30 is a minor error, |
Anonymous | May 30, 2016 | |
Page 31 definition |
"information theory" is not bolded like other definitions |
significant.bit | May 29, 2016 | |
Page 34 3rd paragraph |
The following sentence is incorrect: |
Paul Dacus | Jul 04, 2017 | |
Page 34 2nd paragraph |
The following sentences are incorrect: |
Paul Dacus | Jul 04, 2017 | |
Page 37 footnote 3 |
implimentations |
significant.bit | May 29, 2016 | |
Page 38 1st paragraph |
"This is set in the mathematical sense: a group of numbers..." |
significant.bit | May 29, 2016 | |
Page 38 1st line |
The original sequence has 5 Ds, not 4 as described later in the example. |
significant.bit | May 29, 2016 | |
Page 38 near bottom of page |
“… your Entropy for the set.” Unclear whether you’re talking about the whole dataset or the subset of symbols used [ABCD]. |
significant.bit | May 29, 2016 | |
Page 40 after the definition |
"To be practical and concrete, let’s start with a groupof letters, say:" |
Anonymous | Jun 19, 2016 | |
Page 42 mid page |
“This type of transform is known as Delta Coding, or the process of encoding a series of numbers as the difference from the previous number.” |
significant.bit | May 29, 2016 | |
Printed | Page 48 Elias Gamma table |
The values for n=1 and n=2 don't seem to be right. |
Eric Lawrence | Aug 15, 2016 |
Printed | Page 49 Explanation following Elias Delta table |
The algorithm specified after "To decode Elias delta" seems like it would fail to correctly decode when the code is "0" as there wouldn't be any way to tell if the code word is done. |
Eric Lawrence | Aug 15, 2016 |
Printed | Page 50 VarInt block |
The algorithm here says that the "lower 7 bits are used to store the two's complement representation of the number", language mirrored in Google's docs (https://developers.google.com/protocol-buffers/docs/encoding#varints). |
Eric Lawrence | Aug 15, 2016 |
Printed | Page 52 top of page |
The table header block is unnecessarily repeated (widow) on the next page, presumably because the "a) More information on Elias omega..." text was accidentally widowed over to the next page. This is a bit confusing. |
Eric Lawrence | Aug 15, 2016 |
Printed | Page 61 1st paragraph |
When compression formats for video are mentioned, webM is also mentioned. But webM is a container format, not a compression codec. |
Matteo Contrini | Dec 05, 2017 |
Page 64 4th paragraph in the section "Picking the Right Output Value" |
It says that the encoding of the string "GGB" is 83, which needs log2(83) = 7 bits, which needs 1.42 bits per symbol. However, that calculation looks wrong. We need log2(83) / 3 = 2.12 bits per symbol. |
Abhinav Upadhyay | Sep 23, 2023 | |
Page 69 first line |
On this first line |
Anonymous | Jun 21, 2016 | |
Page 69 The example table |
The example for n = 2 has 2^1+0 = 101 |
Anonymous | Jun 25, 2016 | |
Printed | Page 72 8th paragraph |
On section "creating the reference table", the text explains that to calculate the values in a row, it is necessary to multiply the row number with the symbol probability. The correct operation is division, as also reported in the table on the next page. |
Antonio | Jul 02, 2020 |
Printed | Page 86 Point 7 |
The adaptive VLC steps miss the one that should output the "B" character for the first time. |
Matteo Contrini | Feb 04, 2018 |
Printed | Page 91 Second to last paragraph |
WebM is again mentioned as a video compression codec/encoder/algorithm, but WebM is a container format |
Matteo Contrini | Feb 04, 2018 |
Printed | Page 97 1st figure |
The entropy of the two-symbol set should be 0.97, not 2.2, making it vastly superior to the other tokenization options. Less critically, the entropy of the 1st figure on the facing page (p96) is also incorrect: it should be 2.42, not 2.38. |
Kevin Nygaard | Oct 02, 2023 |
Printed | Page 151 1st line |
"context missing" should be "context mixing" |
Matteo Contrini | Feb 13, 2018 |
Printed | Page 157 second sentence |
"GZIP, BZIP, and now" should be "GZIP, and now" |
Eric Lawrence | Aug 04, 2016 |
Printed | Page 168 image block |
Image quality in the black and white printed text is so low that the graphic loses all ability to convey "degrading quality"; each version looks essentially identical. |
Eric Lawrence | Aug 12, 2016 |
Printed | Page 170 image block |
Image quality in the black and white printed text is so low that the graphic loses all ability to convey a distinction between 128 and 32 colors; each version looks essentially identical. |
Eric Lawrence | Aug 12, 2016 |
Printed | Page 197 last word on page |
the word "battery" should instead be "radio". The radio being on is what drains the battery. The battery is always "on". |
Eric Lawrence | Aug 04, 2016 |
Printed | Page 200 first sentence |
"have a valid computing experience" |
Eric Lawrence | Aug 04, 2016 |